122990 has 24 divisors (see below), whose sum is σ = 258552. Its totient is φ = 42000.

The previous prime is 122971. The next prime is 123001. The reversal of 122990 is 99221.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 365 + ... + 615.

It is an arithmetic number, because the mean of its divisors is an integer number (10773).

2¹²²⁹⁹⁰ is an apocalyptic number.

122990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122990 is an abundant number, since it is smaller than the sum of its proper divisors (135562).

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

122990 is a wasteful number, since it uses less digits than its factorization.

122990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 122990 is about 350.6993013965. The cubic root of 122990 is about 49.7305505482.

The spelling of 122990 in words is "one hundred twenty-two thousand, nine hundred ninety".