124857 has 6 divisors (see below), whose sum is σ = 180362. Its totient is φ = 83232.

The previous prime is 124853. The next prime is 124897. The reversal of 124857 is 758421.

It can be written as a sum of positive squares in only one way, i.e., 104976 + 19881 = 324^2 + 141^2 .

It is not a de Polignac number, because 124857 - 2² = 124853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124857.

It is not an unprimeable number, because it can be changed into a prime (124853) 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, 6928 + ... + 6945.

2¹²⁴⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

124857 is a deficient number, since it is larger than the sum of its proper divisors (55505).

124857 is a wasteful number, since it uses less digits than its factorization.

124857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13879 (or 13876 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 124857 is about 353.3511001822. The cubic root of 124857 is about 49.9809260580.

The spelling of 124857 in words is "one hundred twenty-four thousand, eight hundred fifty-seven".