122125591 has 12 divisors (see below), whose sum is σ = 142819200. Its totient is φ = 104123040.

The previous prime is 122125579. The next prime is 122125639. The reversal of 122125591 is 195521221.

It is not a de Polignac number, because 122125591 - 2⁹ = 122125079 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 (122125391) 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 11 ways as a sum of consecutive naturals, for example, 2835 + ... + 15883.

It is an arithmetic number, because the mean of its divisors is an integer number (11901600).

Almost surely, 2^122125591 is an apocalyptic number.

122125591 is a deficient number, since it is larger than the sum of its proper divisors (20693609).

122125591 is a wasteful number, since it uses less digits than its factorization.

122125591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13254 (or 13247 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The square root of 122125591 is about 11051.0447922357. The cubic root of 122125591 is about 496.1376967139.

The spelling of 122125591 in words is "one hundred twenty-two million, one hundred twenty-five thousand, five hundred ninety-one".