122247891 has 12 divisors (see below), whose sum is σ = 176988240. Its totient is φ = 81310320.

The previous prime is 122247887. The next prime is 122247913. The reversal of 122247891 is 198742221.

It is not a de Polignac number, because 122247891 - 2² = 122247887 is a prime.

It is a hoax number, since the sum of its digits (36) 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 (122247091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11520 + ... + 19421.

It is an arithmetic number, because the mean of its divisors is an integer number (14749020).

Almost surely, 2^122247891 is an apocalyptic number.

122247891 is a deficient number, since it is larger than the sum of its proper divisors (54740349).

122247891 is a wasteful number, since it uses less digits than its factorization.

122247891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31386 (or 31383 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 122247891 is about 11056.5768210599. The cubic root of 122247891 is about 496.3032568730.

The spelling of 122247891 in words is "one hundred twenty-two million, two hundred forty-seven thousand, eight hundred ninety-one".