12187017 has 20 divisors (see below), whose sum is σ = 18634000. Its totient is φ = 7933464.

The previous prime is 12187013. The next prime is 12187051. The reversal of 12187017 is 71078121.

It is not a de Polignac number, because 12187017 - 2² = 12187013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12187013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1734 + ... + 5232.

It is an arithmetic number, because the mean of its divisors is an integer number (931700).

Almost surely, 2^12187017 is an apocalyptic number.

It is an amenable number.

12187017 is a deficient number, since it is larger than the sum of its proper divisors (6446983).

12187017 is an equidigital number, since it uses as much as digits as its factorization.

12187017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554 (or 3545 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 12187017 is about 3490.9908335600. The cubic root of 12187017 is about 230.1260619583.

The spelling of 12187017 in words is "twelve million, one hundred eighty-seven thousand, seventeen".