12155012 has 6 divisors (see below), whose sum is σ = 21271278. Its totient is φ = 6077504.

The previous prime is 12154993. The next prime is 12155021. The reversal of 12155012 is 21055121.

It can be written as a sum of positive squares in only one way, i.e., 7761796 + 4393216 = 2786^2 + 2096^2 .

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 as a sum of consecutive naturals, namely, 1519373 + ... + 1519380.

It is an arithmetic number, because the mean of its divisors is an integer number (3545213).

Almost surely, 2^12155012 is an apocalyptic number.

It is an amenable number.

12155012 is a deficient number, since it is larger than the sum of its proper divisors (9116266).

12155012 is a wasteful number, since it uses less digits than its factorization.

12155012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038757 (or 3038755 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 12155012 is about 3486.4038779235. The cubic root of 12155012 is about 229.9244364249.

The spelling of 12155012 in words is "twelve million, one hundred fifty-five thousand, twelve".