12170357 has 2 divisors, whose sum is σ = 12170358. Its totient is φ = 12170356.

The previous prime is 12170309. The next prime is 12170359. The reversal of 12170357 is 75307121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7806436 + 4363921 = 2794^2 + 2089^2 .

It is an emirp because it is prime and its reverse (75307121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12170357 - 2¹² = 12166261 is a prime.

Together with 12170359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12170359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6085178 + 6085179.

It is an arithmetic number, because the mean of its divisors is an integer number (6085179).

Almost surely, 2^12170357 is an apocalyptic number.

It is an amenable number.

12170357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12170357 is an equidigital number, since it uses as much as digits as its factorization.

12170357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 12170357 is about 3488.6038754780. The cubic root of 12170357 is about 230.0211511739.

Adding to 12170357 its reverse (75307121), we get a palindrome (87477478).

The spelling of 12170357 in words is "twelve million, one hundred seventy thousand, three hundred fifty-seven".