256274407 has 4 divisors (see below), whose sum is σ = 256360720. Its totient is φ = 256188096.

The previous prime is 256274401. The next prime is 256274411. The reversal of 256274407 is 704472652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256274407 - 2³ = 256274399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256274401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38538 + ... + 44695.

It is an arithmetic number, because the mean of its divisors is an integer number (64090180).

Almost surely, 2^256274407 is an apocalyptic number.

256274407 is a deficient number, since it is larger than the sum of its proper divisors (86313).

256274407 is an equidigital number, since it uses as much as digits as its factorization.

256274407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86312.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 256274407 is about 16008.5729220315. The cubic root of 256274407 is about 635.1872116284.

The spelling of 256274407 in words is "two hundred fifty-six million, two hundred seventy-four thousand, four hundred seven".