122890215 has 64 divisors (see below), whose sum is σ = 232243200. Its totient is φ = 54332544.

The previous prime is 122890213. The next prime is 122890217. The reversal of 122890215 is 512098221.

It is an interprime number because it is at equal distance from previous prime (122890213) and next prime (122890217).

It is not a de Polignac number, because 122890215 - 2¹ = 122890213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122890213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 514066 + ... + 514304.

It is an arithmetic number, because the mean of its divisors is an integer number (3628800).

Almost surely, 2^122890215 is an apocalyptic number.

122890215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

122890215 is a deficient number, since it is larger than the sum of its proper divisors (109352985).

122890215 is a wasteful number, since it uses less digits than its factorization.

122890215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 122890215 is about 11085.5859114437. The cubic root of 122890215 is about 497.1709767775.

The spelling of 122890215 in words is "one hundred twenty-two million, eight hundred ninety thousand, two hundred fifteen".