12149920 has 24 divisors (see below), whose sum is σ = 28704564. Its totient is φ = 4859904.

The previous prime is 12149881. The next prime is 12149933. The reversal of 12149920 is 2994121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12138256 + 11664 = 3484^2 + 108^2 .

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, 37809 + ... + 38128.

Almost surely, 2^12149920 is an apocalyptic number.

12149920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12149920 is an abundant number, since it is smaller than the sum of its proper divisors (16554644).

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

12149920 is an equidigital number, since it uses as much as digits as its factorization.

12149920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75952 (or 75944 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 12149920 is about 3485.6735360616. The cubic root of 12149920 is about 229.8923251511.

The spelling of 12149920 in words is "twelve million, one hundred forty-nine thousand, nine hundred twenty".