122158128 has 40 divisors (see below), whose sum is σ = 316773376. Its totient is φ = 40564800.

The previous prime is 122158117. The next prime is 122158151. The reversal of 122158128 is 821851221.

It is a junction number, because it is equal to n+sod(n) for n = 122158095 and 122158104.

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, 8313 + ... + 17703.

Almost surely, 2^122158128 is an apocalyptic number.

It is an amenable number.

122158128 is an abundant number, since it is smaller than the sum of its proper divisors (194615248).

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

122158128 is a wasteful number, since it uses less digits than its factorization.

122158128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9673 (or 9667 counting only the distinct ones).

The product of its digits is 2560, while the sum is 30.

The square root of 122158128 is about 11052.5168174493. The cubic root of 122158128 is about 496.1817535430.

The spelling of 122158128 in words is "one hundred twenty-two million, one hundred fifty-eight thousand, one hundred twenty-eight".