7921272 has 16 divisors (see below), whose sum is σ = 19803240. Its totient is φ = 2640416.

The previous prime is 7921261. The next prime is 7921273. The reversal of 7921272 is 2721297.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921273) 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, 165003 + ... + 165050.

Almost surely, 2^7921272 is an apocalyptic number.

It is an amenable number.

7921272 is an abundant number, since it is smaller than the sum of its proper divisors (11881968).

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

7921272 is a wasteful number, since it uses less digits than its factorization.

7921272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330062 (or 330058 counting only the distinct ones).

The product of its digits is 3528, while the sum is 30.

The square root of 7921272 is about 2814.4754395802. The cubic root of 7921272 is about 199.3417693721.

It can be divided in two parts, 7921 and 272, that multiplied together give a palindrome (2154512).

The spelling of 7921272 in words is "seven million, nine hundred twenty-one thousand, two hundred seventy-two".