256474117 has 2 divisors, whose sum is σ = 256474118. Its totient is φ = 256474116.

The previous prime is 256474093. The next prime is 256474133. The reversal of 256474117 is 711474652.

256474117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256448196 + 25921 = 16014^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 256474117 - 2¹⁵ = 256441349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256474717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128237058 + 128237059.

It is an arithmetic number, because the mean of its divisors is an integer number (128237059).

Almost surely, 2^256474117 is an apocalyptic number.

It is an amenable number.

256474117 is a deficient number, since it is larger than the sum of its proper divisors (1).

256474117 is an equidigital number, since it uses as much as digits as its factorization.

256474117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 256474117 is about 16014.8093026424. The cubic root of 256474117 is about 635.3521654141.

The spelling of 256474117 in words is "two hundred fifty-six million, four hundred seventy-four thousand, one hundred seventeen".