15420556 has 12 divisors (see below), whose sum is σ = 27428800. Its totient is φ = 7583760.

The previous prime is 15420553. The next prime is 15420589. The reversal of 15420556 is 65502451.

15420556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (15420553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31356 + ... + 31843.

Almost surely, 2^15420556 is an apocalyptic number.

It is an amenable number.

15420556 is a deficient number, since it is larger than the sum of its proper divisors (12008244).

15420556 is a wasteful number, since it uses less digits than its factorization.

15420556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63264 (or 63262 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 15420556 is about 3926.9015775800. The cubic root of 15420556 is about 248.9048415169.

The spelling of 15420556 in words is "fifteen million, four hundred twenty thousand, five hundred fifty-six".