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## Science Fair Project Encyclopedia for Schools!

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# Science Fair Project Encyclopedia

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# 4000 (number)

Four thousand (4000) is the natural number following 3999 and preceding 4001. It is a decagonal number.

 Cardinal Four thousand Ordinal Four thousandth Factorization $2^5 \cdot 5^3$ Binary 111110100000 Hexadecimal FA0

## Selected numbers in the range 4001-4999

4005 - triangular number
4007 - safe prime
4010 - magic constant of n×n magic square and n-Queens Problem for n = 20.
4011 - PLU code for yellow bananas
4019 - Sophie Germain prime
4028 - sum of the first 45 primes
4030 - 3rd weird number
4031 - sum of the cubes of the first six primes
4033 - 6th super-Poulet number
4060 - tetrahedral number
4073 - Sophie Germain prime
4079 - safe prime
4095 - triangular number
4096 - 12th power of two, 16th cube, 64^2
4104 = 2^3 + 16^3 = 9^3 + 15^3
4127 - safe prime
4139 - safe prime
4166 - centered heptagonal number
4181 - Fibonacci number
4186 - triangular number
4200 - nonagonal number, pentagonal pyramidal number
4210 - 11th semi-meandric number
4211 - Sophie Germain prime
4219 - cuban prime of the form x = y + 1
4225 = 65^2, centered octagonal number
4227 - sum of the first 46 primes
4257 - decagonal number
4259 - safe prime
4271 - Sophie Germain prime
4278 - triangular number
4283 - safe prime
4324 - 23rd square pyramidal number
4349 - Sophie Germain prime
4356 - sum of the cubes of the first eleven integers, 66^2
4369 - 7th super-Poulet number
4371 - triangular number
4373 - Sophie Germain prime
4391 - Sophie Germain prime
4400 - the number of missing persons in the sci-fi show The 4400
4409 - Sophie Germain prime
4411 - centered heptagonal number
4438 - sum of the first 47 primes
4446 - nonagonal number
4447 - cuban prime of the form x = y + 1
4465 - triangular number
4481 - Sophie Germain prime
4489 = 67^2, centered octagonal number
4495 - tetrahedral number
4503 - largest number not the sum of four or fewer squares of composites
4505 - 5th Zeisel number
4522 - decagonal number
4547 - safe prime
4560 - triangular number
4579 - octahedral number
4607 - Woodall number
4624 = 68^2
4641 - magic constant of n×n magic square and n-Queens Problem for n = 21.
4656 - triangular number
4661 - sum of the first 48 primes
4663 - centered heptagonal number
4679 - safe prime
4681 - 8th super-Poulet number
4699 - nonagonal number
4703 - safe prime
4705 = 48² + 49² = 17² + 18² + ... 26²
4727 - sum of the squares of the first twelve primes
4733 - Sophie Germain prime
4753 - triangular number
4761 = 69^2, centered octagonal number
4787 - safe prime
4788 - 14th Keith number
4793 - Sophie Germain prime
4795 - decagonal number
4799 - safe prime
4801 - cuban prime of the form x = y + 2
4851 - triangular number, pentagonal pyramidal number
4871 - Sophie Germain prime
4879 - 11th Kaprekar number
4888 - sum of the first 49 primes
4900 - the only square-pyramidal square other than 1[1], 70^2
4913 - 17th cube
4919 - Sophie Germain prime, safe prime
4922 - centered heptagonal number
4941 - centered cube number
4943 - Sophie Germain prime
4950 - triangular number, 12th Kaprekar number
4959 - nonagonal number
4960 - tetrahedral number; greater of 4th pair of Smith brothers
03-10-2013 05:06:04