7971456 has 32 divisors (see below), whose sum is σ = 21175200. Its totient is φ = 2657024.

The previous prime is 7971443. The next prime is 7971461. The reversal of 7971456 is 6541797.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×7971456² = 127088221519872, which contains 22 as substring.

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, 9996 + ... + 10763.

It is an arithmetic number, because the mean of its divisors is an integer number (661725).

Almost surely, 2^7971456 is an apocalyptic number.

It is an amenable number.

7971456 is an abundant number, since it is smaller than the sum of its proper divisors (13203744).

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

7971456 is a wasteful number, since it uses less digits than its factorization.

7971456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20776 (or 20764 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 7971456 is about 2823.3767017527. The cubic root of 7971456 is about 199.7618498685.

The spelling of 7971456 in words is "seven million, nine hundred seventy-one thousand, four hundred fifty-six".