256507126 has 16 divisors (see below), whose sum is σ = 394941888. Its totient is φ = 124878600.

The previous prime is 256507123. The next prime is 256507127. The reversal of 256507126 is 621705652.

It is a junction number, because it is equal to n+sod(n) for n = 256507091 and 256507100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256507123) 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 7 ways as a sum of consecutive naturals, for example, 23961 + ... + 32971.

It is an arithmetic number, because the mean of its divisors is an integer number (24683868).

Almost surely, 2^256507126 is an apocalyptic number.

256507126 is a deficient number, since it is larger than the sum of its proper divisors (138434762).

256507126 is a wasteful number, since it uses less digits than its factorization.

256507126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9387.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 256507126 is about 16015.8398468516. The cubic root of 256507126 is about 635.3794214978.

The spelling of 256507126 in words is "two hundred fifty-six million, five hundred seven thousand, one hundred twenty-six".