9121572 has 60 divisors (see below), whose sum is σ = 24393600. Its totient is φ = 2970864.

The previous prime is 9121561. The next prime is 9121601. The reversal of 9121572 is 2751219.

9121572 is a `hidden beast` number, since 91 + 2 + 1 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14929 + ... + 15527.

It is an arithmetic number, because the mean of its divisors is an integer number (406560).

Almost surely, 2^9121572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9121572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12196800).

9121572 is an abundant number, since it is smaller than the sum of its proper divisors (15272028).

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

9121572 is a wasteful number, since it uses less digits than its factorization.

9121572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 651 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 9121572 is about 3020.1940335018. The cubic root of 9121572 is about 208.9407889164.

The spelling of 9121572 in words is "nine million, one hundred twenty-one thousand, five hundred seventy-two".