13128250 has 32 divisors (see below), whose sum is σ = 26030160. Its totient is φ = 4940800.

The previous prime is 13128187. The next prime is 13128251. The reversal of 13128250 is 5282131.

It can be written as a sum of positive squares in 8 ways, for example, as 3892729 + 9235521 = 1973^2 + 3039^2 .

It is not an unprimeable number, because it can be changed into a prime (13128251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2706 + ... + 5794.

Almost surely, 2^13128250 is an apocalyptic number.

13128250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13128250 is a deficient number, since it is larger than the sum of its proper divisors (12901910).

13128250 is a wasteful number, since it uses less digits than its factorization.

13128250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123 (or 3113 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 13128250 is about 3623.2927013974. The cubic root of 13128250 is about 235.9041672572.

The spelling of 13128250 in words is "thirteen million, one hundred twenty-eight thousand, two hundred fifty".