9972257 has 4 divisors (see below), whose sum is σ = 9978900. Its totient is φ = 9965616.

The previous prime is 9972241. The next prime is 9972329. The reversal of 9972257 is 7522799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1234321 + 8737936 = 1111^2 + 2956^2 .

It is a cyclic number.

It is not a de Polignac number, because 9972257 - 2⁴ = 9972241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119 + ... + 4467.

It is an arithmetic number, because the mean of its divisors is an integer number (2494725).

Almost surely, 2^9972257 is an apocalyptic number.

It is an amenable number.

9972257 is a deficient number, since it is larger than the sum of its proper divisors (6643).

9972257 is a wasteful number, since it uses less digits than its factorization.

9972257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642.

The product of its digits is 79380, while the sum is 41.

The square root of 9972257 is about 3157.8880600807. Note that the first 3 decimals coincide. The cubic root of 9972257 is about 215.2440495342.

The spelling of 9972257 in words is "nine million, nine hundred seventy-two thousand, two hundred fifty-seven".