13125928 has 8 divisors (see below), whose sum is σ = 24611130. Its totient is φ = 6562960.

The previous prime is 13125923. The next prime is 13125947. The reversal of 13125928 is 82952131.

It can be written as a sum of positive squares in only one way, i.e., 7279204 + 5846724 = 2698^2 + 2418^2 .

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

It is a super-2 number, since 2×13125928² = 344579971722368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13125928.

It is not an unprimeable number, because it can be changed into a prime (13125923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820363 + ... + 820378.

Almost surely, 2^13125928 is an apocalyptic number.

It is an amenable number.

13125928 is a deficient number, since it is larger than the sum of its proper divisors (11485202).

13125928 is a wasteful number, since it uses less digits than its factorization.

13125928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640747 (or 1640743 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 13125928 is about 3622.9722604514. The cubic root of 13125928 is about 235.8902582753.

The spelling of 13125928 in words is "thirteen million, one hundred twenty-five thousand, nine hundred twenty-eight".