12699157 has 2 divisors, whose sum is σ = 12699158. Its totient is φ = 12699156.

The previous prime is 12699139. The next prime is 12699209. The reversal of 12699157 is 75199621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6895876 + 5803281 = 2626^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 12699157 - 2¹⁵ = 12666389 is a prime.

It is a super-2 number, since 2×12699157² = 322537177021298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12699107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6349578 + 6349579.

It is an arithmetic number, because the mean of its divisors is an integer number (6349579).

Almost surely, 2^12699157 is an apocalyptic number.

It is an amenable number.

12699157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12699157 is an equidigital number, since it uses as much as digits as its factorization.

12699157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 40.

The square root of 12699157 is about 3563.5876585262. The cubic root of 12699157 is about 233.3054930502.

The spelling of 12699157 in words is "twelve million, six hundred ninety-nine thousand, one hundred fifty-seven".