12521280 has 56 divisors (see below), whose sum is σ = 39758112. Its totient is φ = 3338752.

The previous prime is 12521239. The next prime is 12521291. The reversal of 12521280 is 8212521.

It is a happy number.

12521280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5562 + ... + 7481.

Almost surely, 2^12521280 is an apocalyptic number.

12521280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12521280 is an abundant number, since it is smaller than the sum of its proper divisors (27236832).

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

12521280 is a wasteful number, since it uses less digits than its factorization.

12521280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13063 (or 13053 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12521280 is about 3538.5420726621. The cubic root of 12521280 is about 232.2110643646.

The spelling of 12521280 in words is "twelve million, five hundred twenty-one thousand, two hundred eighty".