12531380 has 24 divisors (see below), whose sum is σ = 27864648. Its totient is φ = 4717568.

The previous prime is 12531359. The next prime is 12531383. The reversal of 12531380 is 8313521.

It can be written as a sum of positive squares in 4 ways, for example, as 3118756 + 9412624 = 1766^2 + 3068^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18089 + ... + 18768.

It is an arithmetic number, because the mean of its divisors is an integer number (1161027).

Almost surely, 2^12531380 is an apocalyptic number.

12531380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12531380 is an abundant number, since it is smaller than the sum of its proper divisors (15333268).

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

12531380 is a wasteful number, since it uses less digits than its factorization.

12531380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36883 (or 36881 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12531380 is about 3539.9689264173. The cubic root of 12531380 is about 232.2734834737.

The spelling of 12531380 in words is "twelve million, five hundred thirty-one thousand, three hundred eighty".