7771161 has 4 divisors (see below), whose sum is σ = 10361552. Its totient is φ = 5180772.

The previous prime is 7771139. The next prime is 7771177. The reversal of 7771161 is 1611777.

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 not a de Polignac number, because 7771161 - 2¹⁴ = 7754777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7771061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1295191 + ... + 1295196.

It is an arithmetic number, because the mean of its divisors is an integer number (2590388).

Almost surely, 2^7771161 is an apocalyptic number.

It is an amenable number.

7771161 is a deficient number, since it is larger than the sum of its proper divisors (2590391).

7771161 is a wasteful number, since it uses less digits than its factorization.

7771161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590390.

The product of its digits is 2058, while the sum is 30.

The square root of 7771161 is about 2787.6802183895. The cubic root of 7771161 is about 198.0745306603.

The spelling of 7771161 in words is "seven million, seven hundred seventy-one thousand, one hundred sixty-one".