121285256 has 16 divisors (see below), whose sum is σ = 237297600. Its totient is φ = 58005904.

The previous prime is 121285247. The next prime is 121285261. The reversal of 121285256 is 652582121.

It is a super-2 number, since 2×121285256² = 29420226645971072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329396 + ... + 329763.

It is an arithmetic number, because the mean of its divisors is an integer number (14831100).

Almost surely, 2^121285256 is an apocalyptic number.

It is an amenable number.

121285256 is a deficient number, since it is larger than the sum of its proper divisors (116012344).

121285256 is a wasteful number, since it uses less digits than its factorization.

121285256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659188 (or 659184 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 121285256 is about 11012.9585489096. The cubic root of 121285256 is about 494.9971172842.

It can be divided in two parts, 1212 and 85256, that added together give a palindrome (86468).

The spelling of 121285256 in words is "one hundred twenty-one million, two hundred eighty-five thousand, two hundred fifty-six".