122137491 has 24 divisors (see below), whose sum is σ = 196437504. Its totient is φ = 66115440.

The previous prime is 122137403. The next prime is 122137507. The reversal of 122137491 is 194731221.

It is not a de Polignac number, because 122137491 - 2⁹ = 122136979 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (122137891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 475 + ... + 15636.

It is an arithmetic number, because the mean of its divisors is an integer number (8184896).

Almost surely, 2^122137491 is an apocalyptic number.

122137491 is a deficient number, since it is larger than the sum of its proper divisors (74300013).

122137491 is a wasteful number, since it uses less digits than its factorization.

122137491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16159 (or 16140 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 122137491 is about 11051.5831897516. The cubic root of 122137491 is about 496.1538108546.

The spelling of 122137491 in words is "one hundred twenty-two million, one hundred thirty-seven thousand, four hundred ninety-one".