7972491 has 8 divisors (see below), whose sum is σ = 10889424. Its totient is φ = 5185280.

The previous prime is 7972453. The next prime is 7972499. The reversal of 7972491 is 1942797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7972491 is a prime.

It is a super-2 number, since 2×7972491² = 127121225490162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7972499) 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, 32286 + ... + 32531.

It is an arithmetic number, because the mean of its divisors is an integer number (1361178).

Almost surely, 2^7972491 is an apocalyptic number.

7972491 is a deficient number, since it is larger than the sum of its proper divisors (2916933).

7972491 is a wasteful number, since it uses less digits than its factorization.

7972491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64861.

The product of its digits is 31752, while the sum is 39.

The square root of 7972491 is about 2823.5599869668. The cubic root of 7972491 is about 199.7704950715.

The spelling of 7972491 in words is "seven million, nine hundred seventy-two thousand, four hundred ninety-one".