122566990 has 48 divisors (see below), whose sum is σ = 272274912. Its totient is φ = 38684736.

The previous prime is 122566981. The next prime is 122567009. The reversal of 122566990 is 99665221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333787 + ... + 334153.

It is an arithmetic number, because the mean of its divisors is an integer number (5672394).

Almost surely, 2^122566990 is an apocalyptic number.

122566990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122566990 is an abundant number, since it is smaller than the sum of its proper divisors (149707922).

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

122566990 is an equidigital number, since it uses as much as digits as its factorization.

122566990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 122566990 is about 11070.9976966848. The cubic root of 122566990 is about 496.7347088338.

The spelling of 122566990 in words is "one hundred twenty-two million, five hundred sixty-six thousand, nine hundred ninety".