7971081 has 4 divisors (see below), whose sum is σ = 10628112. Its totient is φ = 5314052.

The previous prime is 7971031. The next prime is 7971091. The reversal of 7971081 is 1801797.

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 7971081 - 2⁶ = 7971017 is a prime.

It is a super-2 number, since 2×7971081² = 127076264617122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7971031) 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, 1328511 + ... + 1328516.

It is an arithmetic number, because the mean of its divisors is an integer number (2657028).

Almost surely, 2^7971081 is an apocalyptic number.

It is an amenable number.

7971081 is a deficient number, since it is larger than the sum of its proper divisors (2657031).

7971081 is a wasteful number, since it uses less digits than its factorization.

7971081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657030.

The product of its (nonzero) digits is 3528, while the sum is 33.

The square root of 7971081 is about 2823.3102911299. The cubic root of 7971081 is about 199.7587173638.

The spelling of 7971081 in words is "seven million, nine hundred seventy-one thousand, eighty-one".