13257028 has 6 divisors (see below), whose sum is σ = 23199806. Its totient is φ = 6628512.

The previous prime is 13257017. The next prime is 13257043. The reversal of 13257028 is 82075231.

It can be written as a sum of positive squares in only one way, i.e., 8248384 + 5008644 = 2872^2 + 2238^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13256987 and 13257005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1657125 + ... + 1657132.

Almost surely, 2^13257028 is an apocalyptic number.

It is an amenable number.

13257028 is a deficient number, since it is larger than the sum of its proper divisors (9942778).

13257028 is a wasteful number, since it uses less digits than its factorization.

13257028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314261 (or 3314259 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 13257028 is about 3641.0201867059. The cubic root of 13257028 is about 236.6730047455.

The spelling of 13257028 in words is "thirteen million, two hundred fifty-seven thousand, twenty-eight".