12185977 has 4 divisors (see below), whose sum is σ = 12332880. Its totient is φ = 12039076.

The previous prime is 12185959. The next prime is 12185981. The reversal of 12185977 is 77958121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12185977 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12185917) 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, 73327 + ... + 73492.

It is an arithmetic number, because the mean of its divisors is an integer number (3083220).

Almost surely, 2^12185977 is an apocalyptic number.

It is an amenable number.

12185977 is a deficient number, since it is larger than the sum of its proper divisors (146903).

12185977 is an equidigital number, since it uses as much as digits as its factorization.

12185977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146902.

The product of its digits is 35280, while the sum is 40.

The square root of 12185977 is about 3490.8418755366. The cubic root of 12185977 is about 230.1195157047.

The spelling of 12185977 in words is "twelve million, one hundred eighty-five thousand, nine hundred seventy-seven".