12155072 has 28 divisors (see below), whose sum is σ = 24246840. Its totient is φ = 6045696.

The previous prime is 12155057. The next prime is 12155081. The reversal of 12155072 is 27055121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16079 + ... + 16817.

Almost surely, 2^12155072 is an apocalyptic number.

It is an amenable number.

12155072 is a deficient number, since it is larger than the sum of its proper divisors (12091768).

12155072 is an equidigital number, since it uses as much as digits as its factorization.

12155072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 12155072 is about 3486.4124827679. The cubic root of 12155072 is about 229.9248147447.

The spelling of 12155072 in words is "twelve million, one hundred fifty-five thousand, seventy-two".