256257134 has 16 divisors (see below), whose sum is σ = 450013536. Its totient is φ = 107145600.

The previous prime is 256257121. The next prime is 256257139. The reversal of 256257134 is 431752652.

It is a junction number, because it is equal to n+sod(n) for n = 256257094 and 256257103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256257139) 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, 222647 + ... + 223794.

It is an arithmetic number, because the mean of its divisors is an integer number (28125846).

Almost surely, 2^256257134 is an apocalyptic number.

256257134 is a deficient number, since it is larger than the sum of its proper divisors (193756402).

256257134 is a wasteful number, since it uses less digits than its factorization.

256257134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446491.

The product of its digits is 50400, while the sum is 35.

The square root of 256257134 is about 16008.0334207547. The cubic root of 256257134 is about 635.1729406817.

The spelling of 256257134 in words is "two hundred fifty-six million, two hundred fifty-seven thousand, one hundred thirty-four".