12990157 has 2 divisors, whose sum is σ = 12990158. Its totient is φ = 12990156.

The previous prime is 12990151. The next prime is 12990163. The reversal of 12990157 is 75109921.

It is a balanced prime because it is at equal distance from previous prime (12990151) and next prime (12990163).

It can be written as a sum of positive squares in only one way, i.e., 11417641 + 1572516 = 3379^2 + 1254^2 .

It is a cyclic number.

It is not a de Polignac number, because 12990157 - 2³ = 12990149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12990151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6495078 + 6495079.

It is an arithmetic number, because the mean of its divisors is an integer number (6495079).

Almost surely, 2^12990157 is an apocalyptic number.

It is an amenable number.

12990157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12990157 is an equidigital number, since it uses as much as digits as its factorization.

12990157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 12990157 is about 3604.1860384836. The cubic root of 12990157 is about 235.0741097182.

The spelling of 12990157 in words is "twelve million, nine hundred ninety thousand, one hundred fifty-seven".