12180939 has 4 divisors (see below), whose sum is σ = 16241256. Its totient is φ = 8120624.

The previous prime is 12180913. The next prime is 12180947. The reversal of 12180939 is 93908121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12180939 - 2⁸ = 12180683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12180979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2030154 + ... + 2030159.

It is an arithmetic number, because the mean of its divisors is an integer number (4060314).

Almost surely, 2^12180939 is an apocalyptic number.

12180939 is a deficient number, since it is larger than the sum of its proper divisors (4060317).

12180939 is an equidigital number, since it uses as much as digits as its factorization.

12180939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060316.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 12180939 is about 3490.1201985032. The cubic root of 12180939 is about 230.0877988681.

The spelling of 12180939 in words is "twelve million, one hundred eighty thousand, nine hundred thirty-nine".