7972457 has 4 divisors (see below), whose sum is σ = 8392080. Its totient is φ = 7552836.

The previous prime is 7972453. The next prime is 7972499. The reversal of 7972457 is 7542797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7972457 - 2² = 7972453 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (7972451) 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 3 ways as a sum of consecutive naturals, for example, 209783 + ... + 209820.

It is an arithmetic number, because the mean of its divisors is an integer number (2098020).

Almost surely, 2^7972457 is an apocalyptic number.

It is an amenable number.

7972457 is a deficient number, since it is larger than the sum of its proper divisors (419623).

7972457 is a wasteful number, since it uses less digits than its factorization.

7972457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419622.

The product of its digits is 123480, while the sum is 41.

The square root of 7972457 is about 2823.5539661923. The cubic root of 7972457 is about 199.7702110864.

The spelling of 7972457 in words is "seven million, nine hundred seventy-two thousand, four hundred fifty-seven".