12157237 has 2 divisors, whose sum is σ = 12157238. Its totient is φ = 12157236.

The previous prime is 12157219. The next prime is 12157247. The reversal of 12157237 is 73275121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12152196 + 5041 = 3486^2 + 71^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12157237 is a prime.

It is a super-2 number, since 2×12157237² = 295596822948338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12157247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078618 + 6078619.

It is an arithmetic number, because the mean of its divisors is an integer number (6078619).

Almost surely, 2^12157237 is an apocalyptic number.

It is an amenable number.

12157237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12157237 is an equidigital number, since it uses as much as digits as its factorization.

12157237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 28.

The square root of 12157237 is about 3486.7229600299. The cubic root of 12157237 is about 229.9384649496.

The spelling of 12157237 in words is "twelve million, one hundred fifty-seven thousand, two hundred thirty-seven".