122515421 has 16 divisors (see below), whose sum is σ = 144399360. Its totient is φ = 101761920.

The previous prime is 122515397. The next prime is 122515427. The reversal of 122515421 is 124515221.

It is a cyclic number.

It is not a de Polignac number, because 122515421 - 2²⁶ = 55406557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122515427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43700 + ... + 46418.

It is an arithmetic number, because the mean of its divisors is an integer number (9024960).

Almost surely, 2^122515421 is an apocalyptic number.

It is an amenable number.

122515421 is a deficient number, since it is larger than the sum of its proper divisors (21883939).

122515421 is a wasteful number, since it uses less digits than its factorization.

122515421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924.

The product of its digits is 800, while the sum is 23.

The square root of 122515421 is about 11068.6684384347. The cubic root of 122515421 is about 496.6650334516.

The spelling of 122515421 in words is "one hundred twenty-two million, five hundred fifteen thousand, four hundred twenty-one".