7981161 has 16 divisors (see below), whose sum is σ = 11222016. Its totient is φ = 5035536.

The previous prime is 7981151. The next prime is 7981189. The reversal of 7981161 is 1611897.

It is not a de Polignac number, because 7981161 - 2⁷ = 7981033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7981151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6546 + ... + 7668.

It is an arithmetic number, because the mean of its divisors is an integer number (701376).

Almost surely, 2^7981161 is an apocalyptic number.

It is an amenable number.

7981161 is a deficient number, since it is larger than the sum of its proper divisors (3240855).

7981161 is a wasteful number, since it uses less digits than its factorization.

7981161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252.

The product of its digits is 3024, while the sum is 33.

The square root of 7981161 is about 2825.0948656638. The cubic root of 7981161 is about 199.8428849399.

The spelling of 7981161 in words is "seven million, nine hundred eighty-one thousand, one hundred sixty-one".