122890645 has 4 divisors (see below), whose sum is σ = 147468780. Its totient is φ = 98312512.

The previous prime is 122890631. The next prime is 122890657. The reversal of 122890645 is 546098221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24940036 + 97950609 = 4994^2 + 9897^2 .

It is a cyclic number.

It is not a de Polignac number, because 122890645 - 2⁹ = 122890133 is a prime.

It is a super-2 number, since 2×122890645² = 30204221257032050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12289060 + ... + 12289069.

It is an arithmetic number, because the mean of its divisors is an integer number (36867195).

Almost surely, 2^122890645 is an apocalyptic number.

It is an amenable number.

122890645 is a deficient number, since it is larger than the sum of its proper divisors (24578135).

122890645 is an equidigital number, since it uses as much as digits as its factorization.

122890645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24578134.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 122890645 is about 11085.6053059813. The cubic root of 122890645 is about 497.1715566535.

The spelling of 122890645 in words is "one hundred twenty-two million, eight hundred ninety thousand, six hundred forty-five".