4256739281 has 8 divisors (see below), whose sum is σ = 4320137760. Its totient is φ = 4193478432.

The previous prime is 4256739247. The next prime is 4256739317. The reversal of 4256739281 is 1829376524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4256739281 is a prime.

It is a super-2 number, since 2×4256739281² = 36239658612816793922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4256739241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28766 + ... + 96648.

It is an arithmetic number, because the mean of its divisors is an integer number (540017220).

Almost surely, 2^4256739281 is an apocalyptic number.

It is an amenable number.

4256739281 is a deficient number, since it is larger than the sum of its proper divisors (63398479).

4256739281 is an equidigital number, since it uses as much as digits as its factorization.

4256739281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68815.

The product of its digits is 725760, while the sum is 47.

The square root of 4256739281 is about 65243.6915034703. The cubic root of 4256739281 is about 1620.6616310037.

The spelling of 4256739281 in words is "four billion, two hundred fifty-six million, seven hundred thirty-nine thousand, two hundred eighty-one".