9972251 has 4 divisors (see below), whose sum is σ = 10558872. Its totient is φ = 9385632.

The previous prime is 9972241. The next prime is 9972329. The reversal of 9972251 is 1522799.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 9972251 - 2⁶ = 9972187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9972241) 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, 293285 + ... + 293318.

It is an arithmetic number, because the mean of its divisors is an integer number (2639718).

Almost surely, 2^9972251 is an apocalyptic number.

9972251 is a deficient number, since it is larger than the sum of its proper divisors (586621).

9972251 is a wasteful number, since it uses less digits than its factorization.

9972251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586620.

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

The square root of 9972251 is about 3157.8871100785. The cubic root of 9972251 is about 215.2440063656.

The spelling of 9972251 in words is "nine million, nine hundred seventy-two thousand, two hundred fifty-one".