7972015 has 4 divisors (see below), whose sum is σ = 9566424. Its totient is φ = 6377608.

The previous prime is 7972009. The next prime is 7972033. The reversal of 7972015 is 5102797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5102797 = 7 ⋅728971.

It is a cyclic number.

It is not a de Polignac number, because 7972015 - 2⁹ = 7971503 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797197 + ... + 797206.

It is an arithmetic number, because the mean of its divisors is an integer number (2391606).

Almost surely, 2^7972015 is an apocalyptic number.

7972015 is a deficient number, since it is larger than the sum of its proper divisors (1594409).

7972015 is a wasteful number, since it uses less digits than its factorization.

7972015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594408.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 7972015 is about 2823.4756949547. The cubic root of 7972015 is about 199.7665192063.

The spelling of 7972015 in words is "seven million, nine hundred seventy-two thousand, fifteen".