124255609 has 9 divisors (see below), whose sum is σ = 126838191. Its totient is φ = 121725240.

The previous prime is 124255589. The next prime is 124255613. The reversal of 124255609 is 906552421.

It is a happy number.

The square root of 124255609 is 11147.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 36421225 + 87834384 = 6035^2 + 9372^2 .

It is not a de Polignac number, because 124255609 - 2⁹ = 124255097 is a prime.

It is a super-5 number, since 5×124255609⁵ (a number of 42 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124255699) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 791359 + ... + 791515.

Almost surely, 2^124255609 is an apocalyptic number.

124255609 is the 11147-th square number.

124255609 is the 5574-th centered octagonal number.

It is an amenable number.

124255609 is a deficient number, since it is larger than the sum of its proper divisors (2582582).

124255609 is an frugal number, since it uses more digits than its factorization.

124255609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The cubic root of 124255609 is about 499.0055019253.

The spelling of 124255609 in words is "one hundred twenty-four million, two hundred fifty-five thousand, six hundred nine".