12985157 has 2 divisors, whose sum is σ = 12985158. Its totient is φ = 12985156.

The previous prime is 12985153. The next prime is 12985163. The reversal of 12985157 is 75158921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12967201 + 17956 = 3601^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 12985157 - 2² = 12985153 is a prime.

It is a super-2 number, since 2×12985157² = 337228604629298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12985157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12985153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6492578 + 6492579.

It is an arithmetic number, because the mean of its divisors is an integer number (6492579).

Almost surely, 2^12985157 is an apocalyptic number.

It is an amenable number.

12985157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12985157 is an equidigital number, since it uses as much as digits as its factorization.

12985157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 38.

The square root of 12985157 is about 3603.4923338339. The cubic root of 12985157 is about 235.0439453051.

The spelling of 12985157 in words is "twelve million, nine hundred eighty-five thousand, one hundred fifty-seven".