122640531 has 32 divisors (see below), whose sum is σ = 187729920. Its totient is φ = 70629504.

The previous prime is 122640523. The next prime is 122640541. The reversal of 122640531 is 135046221.

It is not a de Polignac number, because 122640531 - 2³ = 122640523 is a prime.

It is a super-2 number, since 2×122640531² = 30081399687923922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122640521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40705 + ... + 43613.

It is an arithmetic number, because the mean of its divisors is an integer number (5866560).

Almost surely, 2^122640531 is an apocalyptic number.

122640531 is a deficient number, since it is larger than the sum of its proper divisors (65089389).

122640531 is a wasteful number, since it uses less digits than its factorization.

122640531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 122640531 is about 11074.3185343388. The cubic root of 122640531 is about 496.8340370012.

Adding to 122640531 its reverse (135046221), we get a palindrome (257686752).

The spelling of 122640531 in words is "one hundred twenty-two million, six hundred forty thousand, five hundred thirty-one".