122917572 has 18 divisors (see below), whose sum is σ = 310708398. Its totient is φ = 40972512.

The previous prime is 122917567. The next prime is 122917579. The reversal of 122917572 is 275719221.

It can be written as a sum of positive squares in only one way, i.e., 96353856 + 26563716 = 9816^2 + 5154^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3414377 = 122917572 / (1 + 2 + 2 + 9 + 1 + 7 + 5 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (122917579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1707153 + ... + 1707224.

Almost surely, 2^122917572 is an apocalyptic number.

122917572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

122917572 is an abundant number, since it is smaller than the sum of its proper divisors (187790826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122917572 is a wasteful number, since it uses less digits than its factorization.

122917572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414387 (or 3414382 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 122917572 is about 11086.8197423788. The cubic root of 122917572 is about 497.2078663359.

The spelling of 122917572 in words is "one hundred twenty-two million, nine hundred seventeen thousand, five hundred seventy-two".