123564172 has 12 divisors (see below), whose sum is σ = 219902760. Its totient is φ = 60734816.

The previous prime is 123564167. The next prime is 123564173. The reversal of 123564172 is 271465321.

It is not an unprimeable number, because it can be changed into a prime (123564173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261553 + ... + 262024.

It is an arithmetic number, because the mean of its divisors is an integer number (18325230).

Almost surely, 2^123564172 is an apocalyptic number.

It is an amenable number.

123564172 is a deficient number, since it is larger than the sum of its proper divisors (96338588).

123564172 is a wasteful number, since it uses less digits than its factorization.

123564172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523640 (or 523638 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 123564172 is about 11115.9422452620. The cubic root of 123564172 is about 498.0781853878.

The spelling of 123564172 in words is "one hundred twenty-three million, five hundred sixty-four thousand, one hundred seventy-two".