122785572 has 72 divisors (see below), whose sum is σ = 358934016. Its totient is φ = 32380992.

The previous prime is 122785567. The next prime is 122785583. The reversal of 122785572 is 275587221.

It is a super-4 number, since 4×122785572⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 122785572.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 388 + ... + 15675.

Almost surely, 2^122785572 is an apocalyptic number.

122785572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122785572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179467008).

122785572 is an abundant number, since it is smaller than the sum of its proper divisors (236148444).

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

122785572 is a wasteful number, since it uses less digits than its factorization.

122785572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16097 (or 16088 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 122785572 is about 11080.8651286802. The cubic root of 122785572 is about 497.0298203360.

The spelling of 122785572 in words is "one hundred twenty-two million, seven hundred eighty-five thousand, five hundred seventy-two".