1931161 has 8 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 1867632.

The previous prime is 1931159. The next prime is 1931177. The reversal of 1931161 is 1611391.

It is a happy number.

1931161 is nontrivially palindromic in base 11.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1931161 - 2¹ = 1931159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1931101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4180 + ... + 4618.

It is an arithmetic number, because the mean of its divisors is an integer number (249480).

2^1931161 is an apocalyptic number.

It is an amenable number.

1931161 is a deficient number, since it is larger than the sum of its proper divisors (64679).

1931161 is an equidigital number, since it uses as much as digits as its factorization.

1931161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its digits is 162, while the sum is 22.

The square root of 1931161 is about 1389.6621891668. The cubic root of 1931161 is about 124.5296671826.

The spelling of 1931161 in words is "one million, nine hundred thirty-one thousand, one hundred sixty-one".