12155552 has 24 divisors (see below), whose sum is σ = 24174612. Its totient is φ = 6016000.

The previous prime is 12155537. The next prime is 12155567. The reversal of 12155552 is 25555121.

12155552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12155537) and next prime (12155567).

It can be written as a sum of positive squares in 2 ways, for example, as 11316496 + 839056 = 3364^2 + 916^2 .

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, 1352 + ... + 5112.

Almost surely, 2^12155552 is an apocalyptic number.

It is an amenable number.

12155552 is a deficient number, since it is larger than the sum of its proper divisors (12019060).

12155552 is a wasteful number, since it uses less digits than its factorization.

12155552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872 (or 3864 counting only the distinct ones).

The product of its digits is 2500, while the sum is 26.

The square root of 12155552 is about 3486.4813207588. The cubic root of 12155552 is about 229.9278412579.

The spelling of 12155552 in words is "twelve million, one hundred fifty-five thousand, five hundred fifty-two".