12155902 has 12 divisors (see below), whose sum is σ = 20042568. Its totient is φ = 5525300.

The previous prime is 12155893. The next prime is 12155903. The reversal of 12155902 is 20955121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24874 + ... + 25357.

It is an arithmetic number, because the mean of its divisors is an integer number (1670214).

Almost surely, 2^12155902 is an apocalyptic number.

12155902 is a deficient number, since it is larger than the sum of its proper divisors (7886666).

12155902 is a wasteful number, since it uses less digits than its factorization.

12155902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50255 (or 50244 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 12155902 is about 3486.5315142703. The cubic root of 12155902 is about 229.9300480402.

It can be divided in two parts, 1215 and 5902, that added together give a palindrome (7117).

The spelling of 12155902 in words is "twelve million, one hundred fifty-five thousand, nine hundred two".