15975420 has 48 divisors (see below), whose sum is σ = 44906400. Its totient is φ = 4243456.

The previous prime is 15975391. The next prime is 15975437. The reversal of 15975420 is 2457951.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26644 + ... + 27236.

It is an arithmetic number, because the mean of its divisors is an integer number (935550).

Almost surely, 2^15975420 is an apocalyptic number.

15975420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15975420 is an abundant number, since it is smaller than the sum of its proper divisors (28930980).

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

15975420 is a wasteful number, since it uses less digits than its factorization.

15975420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 15975420 is about 3996.9263190607. The cubic root of 15975420 is about 251.8551069307.

The spelling of 15975420 in words is "fifteen million, nine hundred seventy-five thousand, four hundred twenty".