12904155 has 48 divisors (see below), whose sum is σ = 24710400. Its totient is φ = 6177600.

The previous prime is 12904141. The next prime is 12904169. The reversal of 12904155 is 55140921.

12904155 is digitally balanced in base 3, 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 (12904141) and next prime (12904169).

It is not a de Polignac number, because 12904155 - 2⁷ = 12904027 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64746 + ... + 64944.

It is an arithmetic number, because the mean of its divisors is an integer number (514800).

Almost surely, 2^12904155 is an apocalyptic number.

12904155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12904155 is a deficient number, since it is larger than the sum of its proper divisors (11806245).

12904155 is a wasteful number, since it uses less digits than its factorization.

12904155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 12904155 is about 3592.2353764752. The cubic root of 12904155 is about 234.5541872373.

It can be divided in two parts, 1290 and 4155, that added together give a palindrome (5445).

The spelling of 12904155 in words is "twelve million, nine hundred four thousand, one hundred fifty-five".