7987161 has 32 divisors (see below), whose sum is σ = 13886208. Its totient is φ = 3962880.

The previous prime is 7987139. The next prime is 7987223. The reversal of 7987161 is 1617897.

It is not a de Polignac number, because 7987161 - 2⁵ = 7987129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (7987561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3781 + ... + 5501.

It is an arithmetic number, because the mean of its divisors is an integer number (433944).

Almost surely, 2^7987161 is an apocalyptic number.

It is an amenable number.

7987161 is a deficient number, since it is larger than the sum of its proper divisors (5899047).

7987161 is a wasteful number, since it uses less digits than its factorization.

7987161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761.

The product of its digits is 21168, while the sum is 39.

The square root of 7987161 is about 2826.1565774033. The cubic root of 7987161 is about 199.8929510462.

The spelling of 7987161 in words is "seven million, nine hundred eighty-seven thousand, one hundred sixty-one".