12155504 has 10 divisors (see below), whose sum is σ = 23551320. Its totient is φ = 6077744.

The previous prime is 12155501. The next prime is 12155509. The reversal of 12155504 is 40555121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12155504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155501) by changing a digit.

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 as a sum of consecutive naturals, namely, 379844 + ... + 379875.

It is an arithmetic number, because the mean of its divisors is an integer number (2355132).

Almost surely, 2^12155504 is an apocalyptic number.

It is an amenable number.

12155504 is a deficient number, since it is larger than the sum of its proper divisors (11395816).

12155504 is an equidigital number, since it uses as much as digits as its factorization.

12155504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759727 (or 759721 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 12155504 is about 3486.4744370209. The cubic root of 12155504 is about 229.9275386101.

The spelling of 12155504 in words is "twelve million, one hundred fifty-five thousand, five hundred four".