771161 has 4 divisors (see below), whose sum is σ = 778752. Its totient is φ = 763572.

The previous prime is 771143. The next prime is 771163. The reversal of 771161 is 161177.

771161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-771161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (771163) 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, 3641 + ... + 3846.

It is an arithmetic number, because the mean of its divisors is an integer number (194688).

2⁷⁷¹¹⁶¹ is an apocalyptic number.

It is an amenable number.

771161 is a deficient number, since it is larger than the sum of its proper divisors (7591).

771161 is a wasteful number, since it uses less digits than its factorization.

771161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7590.

The product of its digits is 294, while the sum is 23.

The square root of 771161 is about 878.1577307067. The cubic root of 771161 is about 91.7026077611.

The spelling of 771161 in words is "seven hundred seventy-one thousand, one hundred sixty-one".