12549920 has 24 divisors (see below), whose sum is σ = 29649564. Its totient is φ = 5019904.

The previous prime is 12549913. The next prime is 12550001. The reversal of 12549920 is 2994521.

It can be written as a sum of positive squares in 2 ways, for example, as 11916304 + 633616 = 3452^2 + 796^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 39059 + ... + 39378.

Almost surely, 2^12549920 is an apocalyptic number.

12549920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12549920 is an abundant number, since it is smaller than the sum of its proper divisors (17099644).

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

12549920 is an equidigital number, since it uses as much as digits as its factorization.

12549920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78452 (or 78444 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 12549920 is about 3542.5866256169. The cubic root of 12549920 is about 232.3879754770.

The spelling of 12549920 in words is "twelve million, five hundred forty-nine thousand, nine hundred twenty".