7761161 has 4 divisors (see below), whose sum is σ = 7907652. Its totient is φ = 7614672.

The previous prime is 7761151. The next prime is 7761167. The reversal of 7761161 is 1611677.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 1729225 = 2456^2 + 1315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7761161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7761167) 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, 73166 + ... + 73271.

It is an arithmetic number, because the mean of its divisors is an integer number (1976913).

Almost surely, 2^7761161 is an apocalyptic number.

It is an amenable number.

7761161 is a deficient number, since it is larger than the sum of its proper divisors (146491).

7761161 is a wasteful number, since it uses less digits than its factorization.

7761161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146490.

The product of its digits is 1764, while the sum is 29.

The square root of 7761161 is about 2785.8860349986. The cubic root of 7761161 is about 197.9895328276.

The spelling of 7761161 in words is "seven million, seven hundred sixty-one thousand, one hundred sixty-one".