122631591 has 8 divisors (see below), whose sum is σ = 173127024. Its totient is φ = 76945280.

The previous prime is 122631547. The next prime is 122631599. The reversal of 122631591 is 195136221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122631591 - 2¹⁵ = 122598823 is a prime.

It is a super-2 number, since 2×122631591² = 30077014222382562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122631599) 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 7 ways as a sum of consecutive naturals, for example, 1202220 + ... + 1202321.

It is an arithmetic number, because the mean of its divisors is an integer number (21640878).

Almost surely, 2^122631591 is an apocalyptic number.

122631591 is a deficient number, since it is larger than the sum of its proper divisors (50495433).

122631591 is a wasteful number, since it uses less digits than its factorization.

122631591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404561.

The product of its digits is 3240, while the sum is 30.

The square root of 122631591 is about 11073.9148904080. The cubic root of 122631591 is about 496.8219643088.

The spelling of 122631591 in words is "one hundred twenty-two million, six hundred thirty-one thousand, five hundred ninety-one".