15420056 has 8 divisors (see below), whose sum is σ = 28912620. Its totient is φ = 7710024.

The previous prime is 15420049. The next prime is 15420061. The reversal of 15420056 is 65002451.

15420056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 963746 + ... + 963761.

Almost surely, 2^15420056 is an apocalyptic number.

It is an amenable number.

15420056 is a deficient number, since it is larger than the sum of its proper divisors (13492564).

15420056 is a wasteful number, since it uses less digits than its factorization.

15420056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927513 (or 1927509 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 15420056 is about 3926.8379136399. The cubic root of 15420056 is about 248.9021513034.

The spelling of 15420056 in words is "fifteen million, four hundred twenty thousand, fifty-six".