256751274 has 16 divisors (see below), whose sum is σ = 553002912. Its totient is φ = 79000368.

The previous prime is 256751267. The next prime is 256751279. The reversal of 256751274 is 472157652.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (256751279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1645764 + ... + 1645919.

It is an arithmetic number, because the mean of its divisors is an integer number (34562682).

Almost surely, 2^256751274 is an apocalyptic number.

256751274 is an abundant number, since it is smaller than the sum of its proper divisors (296251638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256751274 is a wasteful number, since it uses less digits than its factorization.

256751274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3291701.

The product of its digits is 117600, while the sum is 39.

The square root of 256751274 is about 16023.4601132215. The cubic root of 256751274 is about 635.5809460142.

The spelling of 256751274 in words is "two hundred fifty-six million, seven hundred fifty-one thousand, two hundred seventy-four".