122724642 has 16 divisors (see below), whose sum is σ = 256121280. Its totient is φ = 39129552.

The previous prime is 122724587. The next prime is 122724653. The reversal of 122724642 is 246427221.

It is a super-2 number, since 2×122724642² = 30122675508056328, which contains 22 as substring.

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, 444517 + ... + 444792.

It is an arithmetic number, because the mean of its divisors is an integer number (16007580).

Almost surely, 2^122724642 is an apocalyptic number.

122724642 is an abundant number, since it is smaller than the sum of its proper divisors (133396638).

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

122724642 is a wasteful number, since it uses less digits than its factorization.

122724642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889337.

The product of its digits is 10752, while the sum is 30.

The square root of 122724642 is about 11078.1154534515. The cubic root of 122724642 is about 496.9475928746.

The spelling of 122724642 in words is "one hundred twenty-two million, seven hundred twenty-four thousand, six hundred forty-two".