123315564 has 24 divisors (see below), whose sum is σ = 288035440. Its totient is φ = 41062464.

The previous prime is 123315559. The next prime is 123315571. The reversal of 123315564 is 465513321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8022 + ... + 17634.

Almost surely, 2^123315564 is an apocalyptic number.

It is an amenable number.

123315564 is an abundant number, since it is smaller than the sum of its proper divisors (164719876).

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

123315564 is a wasteful number, since it uses less digits than its factorization.

123315564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10689 (or 10687 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 123315564 is about 11104.7541170437. The cubic root of 123315564 is about 497.7439208581.

Adding to 123315564 its reverse (465513321), we get a palindrome (588828885).

The spelling of 123315564 in words is "one hundred twenty-three million, three hundred fifteen thousand, five hundred sixty-four".