12139552 has 24 divisors (see below), whose sum is σ = 24548076. Its totient is φ = 5905152.

The previous prime is 12139541. The next prime is 12139559. The reversal of 12139552 is 25593121.

It can be written as a sum of positive squares in 2 ways, for example, as 12138256 + 1296 = 3484^2 + 36^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12139552.

It is not an unprimeable number, because it can be changed into a prime (12139559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3943 + ... + 6310.

Almost surely, 2^12139552 is an apocalyptic number.

It is an amenable number.

12139552 is an abundant number, since it is smaller than the sum of its proper divisors (12408524).

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

12139552 is a wasteful number, since it uses less digits than its factorization.

12139552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10300 (or 10292 counting only the distinct ones).

The product of its digits is 2700, while the sum is 28.

The square root of 12139552 is about 3484.1859881470. The cubic root of 12139552 is about 229.8269145165.

The spelling of 12139552 in words is "twelve million, one hundred thirty-nine thousand, five hundred fifty-two".