256430122 has 24 divisors (see below), whose sum is σ = 430888140. Its totient is φ = 114266880.

The previous prime is 256430089. The next prime is 256430123. The reversal of 256430122 is 221034652.

It can be written as a sum of positive squares in 6 ways, for example, as 18931201 + 237498921 = 4351^2 + 15411^2 .

It is not an unprimeable number, because it can be changed into a prime (256430123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3279 + ... + 22882.

Almost surely, 2^256430122 is an apocalyptic number.

256430122 is a deficient number, since it is larger than the sum of its proper divisors (174458018).

256430122 is a wasteful number, since it uses less digits than its factorization.

256430122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26218 (or 26205 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 256430122 is about 16013.4356713355. The cubic root of 256430122 is about 635.3158343705.

Adding to 256430122 its reverse (221034652), we get a palindrome (477464774).

The spelling of 256430122 in words is "two hundred fifty-six million, four hundred thirty thousand, one hundred twenty-two".