122497421 has 4 divisors (see below), whose sum is σ = 126721500. Its totient is φ = 118273344.

The previous prime is 122497357. The next prime is 122497447. The reversal of 122497421 is 124794221.

It is a happy number.

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 104264521 + 18232900 = 10211^2 + 4270^2 .

It is a cyclic number.

It is not a de Polignac number, because 122497421 - 2⁶ = 122497357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122497451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2111996 + ... + 2112053.

It is an arithmetic number, because the mean of its divisors is an integer number (31680375).

Almost surely, 2^122497421 is an apocalyptic number.

It is an amenable number.

122497421 is a deficient number, since it is larger than the sum of its proper divisors (4224079).

122497421 is an equidigital number, since it uses as much as digits as its factorization.

122497421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224078.

The product of its digits is 8064, while the sum is 32.

The square root of 122497421 is about 11067.8553026320. The cubic root of 122497421 is about 496.6407088716.

The spelling of 122497421 in words is "one hundred twenty-two million, four hundred ninety-seven thousand, four hundred twenty-one".