256121024 has 14 divisors (see below), whose sum is σ = 508240284. Its totient is φ = 128060480.

The previous prime is 256121023. The next prime is 256121093. The reversal of 256121024 is 420121652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (256121023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000882 + ... + 2001009.

Almost surely, 2^256121024 is an apocalyptic number.

It is an amenable number.

256121024 is a deficient number, since it is larger than the sum of its proper divisors (252119260).

256121024 is an equidigital number, since it uses as much as digits as its factorization.

256121024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001903 (or 4001893 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 256121024 is about 16003.7815531205. The cubic root of 256121024 is about 635.0604642034.

Adding to 256121024 its reverse (420121652), we get a palindrome (676242676).

The spelling of 256121024 in words is "two hundred fifty-six million, one hundred twenty-one thousand, twenty-four".