123857153 has 12 divisors (see below), whose sum is σ = 145360260. Its totient is φ = 105219072.

The previous prime is 123857141. The next prime is 123857159. The reversal of 123857153 is 351758321.

It can be written as a sum of positive squares in 2 ways, for example, as 22391824 + 101465329 = 4732^2 + 10073^2 .

It is not a de Polignac number, because 123857153 - 2⁴ = 123857137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123857159) 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, 5648 + ... + 16721.

It is an arithmetic number, because the mean of its divisors is an integer number (12113355).

Almost surely, 2^123857153 is an apocalyptic number.

It is an amenable number.

123857153 is a deficient number, since it is larger than the sum of its proper divisors (21503107).

123857153 is a wasteful number, since it uses less digits than its factorization.

123857153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22496 (or 22489 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 123857153 is about 11129.1128577259. The cubic root of 123857153 is about 498.4715363589.

The spelling of 123857153 in words is "one hundred twenty-three million, eight hundred fifty-seven thousand, one hundred fifty-three".