123320564 has 12 divisors (see below), whose sum is σ = 227169600. Its totient is φ = 58414968.

The previous prime is 123320563. The next prime is 123320569. The reversal of 123320564 is 465023321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123320563) 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, 811244 + ... + 811395.

It is an arithmetic number, because the mean of its divisors is an integer number (18930800).

Almost surely, 2^123320564 is an apocalyptic number.

It is an amenable number.

123320564 is a deficient number, since it is larger than the sum of its proper divisors (103849036).

123320564 is a wasteful number, since it uses less digits than its factorization.

123320564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622662 (or 1622660 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 123320564 is about 11104.9792435646. The cubic root of 123320564 is about 497.7506480056.

Adding to 123320564 its reverse (465023321), we get a palindrome (588343885).

The spelling of 123320564 in words is "one hundred twenty-three million, three hundred twenty thousand, five hundred sixty-four".