12139252 has 24 divisors (see below), whose sum is σ = 22497440. Its totient is φ = 5715360.

The previous prime is 12139249. The next prime is 12139277. The reversal of 12139252 is 25293121.

It is a happy number.

It is a super-2 number, since 2×12139252² = 294722878239008, which contains 22 as substring.

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, 15658 + ... + 16414.

Almost surely, 2^12139252 is an apocalyptic number.

It is an amenable number.

12139252 is a deficient number, since it is larger than the sum of its proper divisors (10358188).

12139252 is a wasteful number, since it uses less digits than its factorization.

12139252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 989 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 12139252 is about 3484.1429362183. The cubic root of 12139252 is about 229.8250212933.

The spelling of 12139252 in words is "twelve million, one hundred thirty-nine thousand, two hundred fifty-two".