7881161 has 12 divisors (see below), whose sum is σ = 8341200. Its totient is φ = 7443720.

The previous prime is 7881151. The next prime is 7881163. The reversal of 7881161 is 1611887.

It is not a de Polignac number, because 7881161 - 2¹⁴ = 7864777 is a prime.

It is a super-2 number, since 2×7881161² = 124225397415842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7881163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56630 + ... + 56768.

It is an arithmetic number, because the mean of its divisors is an integer number (695100).

Almost surely, 2^7881161 is an apocalyptic number.

It is an amenable number.

7881161 is a deficient number, since it is larger than the sum of its proper divisors (460039).

7881161 is a wasteful number, since it uses less digits than its factorization.

7881161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 229 counting only the distinct ones).

The product of its digits is 2688, while the sum is 32.

The square root of 7881161 is about 2807.3405564698. The cubic root of 7881161 is about 199.0047304078.

The spelling of 7881161 in words is "seven million, eight hundred eighty-one thousand, one hundred sixty-one".