126127657 has 2 divisors, whose sum is σ = 126127658. Its totient is φ = 126127656.

The previous prime is 126127621. The next prime is 126127691. The reversal of 126127657 is 756721621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108243216 + 17884441 = 10404^2 + 4229^2 .

It is a cyclic number.

It is not a de Polignac number, because 126127657 - 2¹¹ = 126125609 is a prime.

It is not a weakly prime, because it can be changed into another prime (126127697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63063828 + 63063829.

It is an arithmetic number, because the mean of its divisors is an integer number (63063829).

Almost surely, 2^126127657 is an apocalyptic number.

It is an amenable number.

126127657 is a deficient number, since it is larger than the sum of its proper divisors (1).

126127657 is an equidigital number, since it uses as much as digits as its factorization.

126127657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 126127657 is about 11230.6570155089. The cubic root of 126127657 is about 501.4990439100.

The spelling of 126127657 in words is "one hundred twenty-six million, one hundred twenty-seven thousand, six hundred fifty-seven".