122138564 has 12 divisors (see below), whose sum is σ = 213925824. Its totient is φ = 61016904.

The previous prime is 122138561. The next prime is 122138629. The reversal of 122138564 is 465831221.

It is a self number, because there is not a number n which added to its sum of digits gives 122138564.

It is not an unprimeable number, because it can be changed into a prime (122138561) 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, 7592 + ... + 17375.

It is an arithmetic number, because the mean of its divisors is an integer number (17827152).

Almost surely, 2^122138564 is an apocalyptic number.

It is an amenable number.

122138564 is a deficient number, since it is larger than the sum of its proper divisors (91787260).

122138564 is a wasteful number, since it uses less digits than its factorization.

122138564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26194 (or 26192 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 122138564 is about 11051.6317347259. The cubic root of 122138564 is about 496.1552637840.

Adding to 122138564 its reverse (465831221), we get a palindrome (587969785).

The spelling of 122138564 in words is "one hundred twenty-two million, one hundred thirty-eight thousand, five hundred sixty-four".