9215972 has 24 divisors (see below), whose sum is σ = 17170776. Its totient is φ = 4313088.

The previous prime is 9215971. The next prime is 9216019. The reversal of 9215972 is 2795129.

It can be written as a sum of positive squares in 4 ways, for example, as 10816 + 9205156 = 104^2 + 3034^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9215971) 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 7 ways as a sum of consecutive naturals, for example, 21068 + ... + 21500.

It is an arithmetic number, because the mean of its divisors is an integer number (715449).

Almost surely, 2^9215972 is an apocalyptic number.

It is an amenable number.

9215972 is a deficient number, since it is larger than the sum of its proper divisors (7954804).

9215972 is a wasteful number, since it uses less digits than its factorization.

9215972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 765 counting only the distinct ones).

The product of its digits is 11340, while the sum is 35.

The square root of 9215972 is about 3035.7819421032. The cubic root of 9215972 is about 209.6590992079.

The spelling of 9215972 in words is "nine million, two hundred fifteen thousand, nine hundred seventy-two".