122928511 has 4 divisors (see below), whose sum is σ = 122964912. Its totient is φ = 122892112.

The previous prime is 122928457. The next prime is 122928539. The reversal of 122928511 is 115829221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122928511 - 2²⁵ = 89374079 is a prime.

It is a super-2 number, since 2×122928511² = 30222837633354242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122928551) 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, 12550 + ... + 20083.

It is an arithmetic number, because the mean of its divisors is an integer number (30741228).

Almost surely, 2^122928511 is an apocalyptic number.

122928511 is a deficient number, since it is larger than the sum of its proper divisors (36401).

122928511 is an equidigital number, since it uses as much as digits as its factorization.

122928511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36400.

The product of its digits is 2880, while the sum is 31.

The square root of 122928511 is about 11087.3130649405. The cubic root of 122928511 is about 497.2226155032. Note that the first 3 decimals are identical.

The spelling of 122928511 in words is "one hundred twenty-two million, nine hundred twenty-eight thousand, five hundred eleven".