12942181 has 8 divisors (see below), whose sum is σ = 15042240. Its totient is φ = 10904928.

The previous prime is 12942179. The next prime is 12942197. The reversal of 12942181 is 18124921.

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 12942181 - 2¹ = 12942179 is a prime.

It is a super-2 number, since 2×12942181² = 335000098073522, which contains 22 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 (12942121) 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, 15256 + ... + 16081.

It is an arithmetic number, because the mean of its divisors is an integer number (1880280).

Almost surely, 2^12942181 is an apocalyptic number.

It is an amenable number.

12942181 is a deficient number, since it is larger than the sum of its proper divisors (2100059).

12942181 is an equidigital number, since it uses as much as digits as its factorization.

12942181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31403.

The product of its digits is 1152, while the sum is 28.

The square root of 12942181 is about 3597.5242876178. The cubic root of 12942181 is about 234.7843562756.

The spelling of 12942181 in words is "twelve million, nine hundred forty-two thousand, one hundred eighty-one".