124091557 has 6 divisors (see below), whose sum is σ = 125611622. Its totient is φ = 122589672.

The previous prime is 124091533. The next prime is 124091563. The reversal of 124091557 is 755190421.

It can be written as a sum of positive squares in only one way, i.e., 121859521 + 2232036 = 11039^2 + 1494^2 .

It is a de Polignac number, because none of the positive numbers 2^k-124091557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124091057) 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, 2118 + ... + 15895.

Almost surely, 2^124091557 is an apocalyptic number.

It is an amenable number.

124091557 is a deficient number, since it is larger than the sum of its proper divisors (1520065).

124091557 is an frugal number, since it uses more digits than its factorization.

124091557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18179 (or 18096 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 124091557 is about 11139.6389977414. The cubic root of 124091557 is about 498.7857964730.

The spelling of 124091557 in words is "one hundred twenty-four million, ninety-one thousand, five hundred fifty-seven".