12521480 has 16 divisors (see below), whose sum is σ = 28173420. Its totient is φ = 5008576.

The previous prime is 12521479. The next prime is 12521501. The reversal of 12521480 is 8412521.

It can be written as a sum of positive squares in 2 ways, for example, as 12432676 + 88804 = 3526^2 + 298^2 .

It is a super-2 number, since 2×12521480² = 313574922780800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156479 + ... + 156558.

Almost surely, 2^12521480 is an apocalyptic number.

12521480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12521480 is an abundant number, since it is smaller than the sum of its proper divisors (15651940).

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

12521480 is a wasteful number, since it uses less digits than its factorization.

12521480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313048 (or 313044 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 12521480 is about 3538.5703327757. The cubic root of 12521480 is about 232.2123007122.

The spelling of 12521480 in words is "twelve million, five hundred twenty-one thousand, four hundred eighty".