12499657 has 2 divisors, whose sum is σ = 12499658. Its totient is φ = 12499656.

The previous prime is 12499651. The next prime is 12499661. The reversal of 12499657 is 75699421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8874441 + 3625216 = 2979^2 + 1904^2 .

It is a cyclic number.

It is not a de Polignac number, because 12499657 - 2¹⁵ = 12466889 is a prime.

It is not a weakly prime, because it can be changed into another prime (12499651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6249828 + 6249829.

It is an arithmetic number, because the mean of its divisors is an integer number (6249829).

Almost surely, 2^12499657 is an apocalyptic number.

It is an amenable number.

12499657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12499657 is an equidigital number, since it uses as much as digits as its factorization.

12499657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 12499657 is about 3535.4853980748. The cubic root of 12499657 is about 232.0773189079.

The spelling of 12499657 in words is "twelve million, four hundred ninety-nine thousand, six hundred fifty-seven".