12331861 has 4 divisors (see below), whose sum is σ = 12343212. Its totient is φ = 12320512.

The previous prime is 12331859. The next prime is 12331871. The reversal of 12331861 is 16813321.

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 7128900 + 5202961 = 2670^2 + 2281^2 .

It is a cyclic number.

It is not a de Polignac number, because 12331861 - 2¹ = 12331859 is a prime.

It is a super-4 number, since 4×12331861⁴ (a number of 29 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3850 + ... + 6283.

It is an arithmetic number, because the mean of its divisors is an integer number (3085803).

Almost surely, 2^12331861 is an apocalyptic number.

It is an amenable number.

12331861 is a deficient number, since it is larger than the sum of its proper divisors (11351).

12331861 is a wasteful number, since it uses less digits than its factorization.

12331861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11350.

The product of its digits is 864, while the sum is 25.

The square root of 12331861 is about 3511.6749564844. The cubic root of 12331861 is about 231.0341647212.

The spelling of 12331861 in words is "twelve million, three hundred thirty-one thousand, eight hundred sixty-one".