126857897 has 2 divisors, whose sum is σ = 126857898. Its totient is φ = 126857896.

The previous prime is 126857891. The next prime is 126857909. The reversal of 126857897 is 798758621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113976976 + 12880921 = 10676^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 126857897 - 2⁸ = 126857641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126857891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63428948 + 63428949.

It is an arithmetic number, because the mean of its divisors is an integer number (63428949).

Almost surely, 2^126857897 is an apocalyptic number.

It is an amenable number.

126857897 is a deficient number, since it is larger than the sum of its proper divisors (1).

126857897 is an equidigital number, since it uses as much as digits as its factorization.

126857897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 53.

The square root of 126857897 is about 11263.1211038504. The cubic root of 126857897 is about 502.4650233487.

The spelling of 126857897 in words is "one hundred twenty-six million, eight hundred fifty-seven thousand, eight hundred ninety-seven".