15121856 has 28 divisors (see below), whose sum is σ = 31315152. Its totient is φ = 7231488.

The previous prime is 15121829. The next prime is 15121889. The reversal of 15121856 is 65812151.

It is a congruent number.

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, 3665 + ... + 6608.

Almost surely, 2^15121856 is an apocalyptic number.

15121856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15121856 is an abundant number, since it is smaller than the sum of its proper divisors (16193296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15121856 is a wasteful number, since it uses less digits than its factorization.

15121856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308 (or 10298 counting only the distinct ones).

The product of its digits is 2400, while the sum is 29.

The square root of 15121856 is about 3888.6830675693. The cubic root of 15121856 is about 247.2872354390.

The spelling of 15121856 in words is "fifteen million, one hundred twenty-one thousand, eight hundred fifty-six".