12155436 has 18 divisors (see below), whose sum is σ = 30726332. Its totient is φ = 4051800.

The previous prime is 12155419. The next prime is 12155447. The reversal of 12155436 is 63455121.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168790 + ... + 168861.

Almost surely, 2^12155436 is an apocalyptic number.

It is an amenable number.

12155436 is an abundant number, since it is smaller than the sum of its proper divisors (18570896).

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

12155436 is a wasteful number, since it uses less digits than its factorization.

12155436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337661 (or 337656 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 12155436 is about 3486.4646850355. The cubic root of 12155436 is about 229.9271098578.

The spelling of 12155436 in words is "twelve million, one hundred fifty-five thousand, four hundred thirty-six".