123155604 has 144 divisors (see below), whose sum is σ = 374250240. Its totient is φ = 33649920.

The previous prime is 123155567. The next prime is 123155611. The reversal of 123155604 is 406551321.

123155604 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 55 + 604 = 666.

It is a congruent number.

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, 241702 + ... + 242210.

It is an arithmetic number, because the mean of its divisors is an integer number (2598960).

Almost surely, 2^123155604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123155604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187125120).

123155604 is an abundant number, since it is smaller than the sum of its proper divisors (251094636).

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

123155604 is a wasteful number, since it uses less digits than its factorization.

123155604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 585 counting only the distinct ones).

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

The square root of 123155604 is about 11097.5494592275. The cubic root of 123155604 is about 497.5286099217.

The spelling of 123155604 in words is "one hundred twenty-three million, one hundred fifty-five thousand, six hundred four".