121972572 has 36 divisors (see below), whose sum is σ = 316655976. Its totient is φ = 39558240.

The previous prime is 121972537. The next prime is 121972583. The reversal of 121972572 is 275279121.

121972572 is a `hidden beast` number, since 1 + 2 + 19 + 72 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44454 + ... + 47117.

Almost surely, 2^121972572 is an apocalyptic number.

121972572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121972572 is an abundant number, since it is smaller than the sum of its proper divisors (194683404).

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

121972572 is a wasteful number, since it uses less digits than its factorization.

121972572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91618 (or 91613 counting only the distinct ones).

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

The square root of 121972572 is about 11044.1193401738. The cubic root of 121972572 is about 495.9303958433.

The spelling of 121972572 in words is "one hundred twenty-one million, nine hundred seventy-two thousand, five hundred seventy-two".