124339561 has 6 divisors (see below), whose sum is σ = 125862650. Its totient is φ = 122834688.

The previous prime is 124339549. The next prime is 124339577. The reversal of 124339561 is 165933421.

It can be written as a sum of positive squares in only one way, i.e., 120033936 + 4305625 = 10956^2 + 2075^2 .

It is not a de Polignac number, because 124339561 - 2⁷ = 124339433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124339361) 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, 2136 + ... + 15913.

Almost surely, 2^124339561 is an apocalyptic number.

It is an amenable number.

124339561 is a deficient number, since it is larger than the sum of its proper divisors (1523089).

124339561 is an frugal number, since it uses more digits than its factorization.

124339561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18215 (or 18132 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 124339561 is about 11150.7650410185. The cubic root of 124339561 is about 499.1178592373.

It can be divided in two parts, 1243 and 39561, that added together give a palindrome (40804).

The spelling of 124339561 in words is "one hundred twenty-four million, three hundred thirty-nine thousand, five hundred sixty-one".