124135857 has 6 divisors (see below), whose sum is σ = 179307362. Its totient is φ = 82757232.

The previous prime is 124135841. The next prime is 124135859. The reversal of 124135857 is 758531421.

It can be written as a sum of positive squares in only one way, i.e., 113870241 + 10265616 = 10671^2 + 3204^2 .

It is not a de Polignac number, because 124135857 - 2⁴ = 124135841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124135859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6896428 + ... + 6896445.

Almost surely, 2^124135857 is an apocalyptic number.

It is an amenable number.

124135857 is a deficient number, since it is larger than the sum of its proper divisors (55171505).

124135857 is a wasteful number, since it uses less digits than its factorization.

124135857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792879 (or 13792876 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 124135857 is about 11141.6272150885. The cubic root of 124135857 is about 498.8451440022.

It can be divided in two parts, 124 and 135857, that added together give a triangular number (135981 = T₅₂₁).

The spelling of 124135857 in words is "one hundred twenty-four million, one hundred thirty-five thousand, eight hundred fifty-seven".