126538857 has 12 divisors (see below), whose sum is σ = 185283124. Its totient is φ = 83203200.

The previous prime is 126538849. The next prime is 126538873. The reversal of 126538857 is 758835621.

126538857 is a `hidden beast` number, since 1 + 265 + 388 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40717161 + 85821696 = 6381^2 + 9264^2 .

It is not a de Polignac number, because 126538857 - 2³ = 126538849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126538877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95644 + ... + 96957.

Almost surely, 2^126538857 is an apocalyptic number.

It is an amenable number.

126538857 is a deficient number, since it is larger than the sum of its proper divisors (58744267).

126538857 is a wasteful number, since it uses less digits than its factorization.

126538857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192680 (or 192677 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 126538857 is about 11248.9491509207. The cubic root of 126538857 is about 502.0434466082.

The spelling of 126538857 in words is "one hundred twenty-six million, five hundred thirty-eight thousand, eight hundred fifty-seven".