122475991 has 8 divisors (see below), whose sum is σ = 135302400. Its totient is φ = 109931640.

The previous prime is 122475931. The next prime is 122476021. The reversal of 122475991 is 199574221.

It is a happy number.

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 122475991 - 2⁷ = 122475863 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 (122475901) 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, 69601 + ... + 71338.

It is an arithmetic number, because the mean of its divisors is an integer number (16912800).

Almost surely, 2^122475991 is an apocalyptic number.

122475991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122475991 is the 5916-th centered heptagonal number.

122475991 is a deficient number, since it is larger than the sum of its proper divisors (12826409).

122475991 is a wasteful number, since it uses less digits than its factorization.

122475991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141029.

The product of its digits is 45360, while the sum is 40.

The square root of 122475991 is about 11066.8871413781. The cubic root of 122475991 is about 496.6117460004.

The spelling of 122475991 in words is "one hundred twenty-two million, four hundred seventy-five thousand, nine hundred ninety-one".