12171659 has 2 divisors, whose sum is σ = 12171660. Its totient is φ = 12171658.

The previous prime is 12171617. The next prime is 12171671. The reversal of 12171659 is 95617121.

It is a strong prime.

It is an emirp because it is prime and its reverse (95617121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12171659 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12171259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6085829 + 6085830.

It is an arithmetic number, because the mean of its divisors is an integer number (6085830).

Almost surely, 2^12171659 is an apocalyptic number.

12171659 is a deficient number, since it is larger than the sum of its proper divisors (1).

12171659 is an equidigital number, since it uses as much as digits as its factorization.

12171659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 32.

The square root of 12171659 is about 3488.7904780884. The cubic root of 12171659 is about 230.0293535315.

The spelling of 12171659 in words is "twelve million, one hundred seventy-one thousand, six hundred fifty-nine".