12231161 has 8 divisors (see below), whose sum is σ = 12587400. Its totient is φ = 11877760.

The previous prime is 12231157. The next prime is 12231169. The reversal of 12231161 is 16113221.

It can be written as a sum of positive squares in 4 ways, for example, as 2621161 + 9610000 = 1619^2 + 3100^2 .

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 12231161 - 2² = 12231157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12231169) 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, 10475 + ... + 11583.

It is an arithmetic number, because the mean of its divisors is an integer number (1573425).

Almost surely, 2^12231161 is an apocalyptic number.

It is an amenable number.

12231161 is a deficient number, since it is larger than the sum of its proper divisors (356239).

12231161 is a wasteful number, since it uses less digits than its factorization.

12231161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419.

The product of its digits is 72, while the sum is 17.

The square root of 12231161 is about 3497.3076787723. The cubic root of 12231161 is about 230.4035825321.

Adding to 12231161 its reverse (16113221), we get a palindrome (28344382).

The spelling of 12231161 in words is "twelve million, two hundred thirty-one thousand, one hundred sixty-one".