15421264 has 20 divisors (see below), whose sum is σ = 30515904. Its totient is φ = 7546208.

The previous prime is 15421253. The next prime is 15421277. The reversal of 15421264 is 46212451.

It is a happy number.

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, 9502 + ... + 11005.

Almost surely, 2^15421264 is an apocalyptic number.

It is an amenable number.

15421264 is a deficient number, since it is larger than the sum of its proper divisors (15094640).

15421264 is a wasteful number, since it uses less digits than its factorization.

15421264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20562 (or 20556 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 15421264 is about 3926.9917239536. The cubic root of 15421264 is about 248.9086507598.

The spelling of 15421264 in words is "fifteen million, four hundred twenty-one thousand, two hundred sixty-four".