124239009 has 8 divisors (see below), whose sum is σ = 175396320. Its totient is φ = 77953856.

The previous prime is 124238999. The next prime is 124239013. The reversal of 124239009 is 900932421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 124239009 - 2⁵ = 124238977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124239019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217979 + ... + 1218080.

It is an arithmetic number, because the mean of its divisors is an integer number (21924540).

Almost surely, 2^124239009 is an apocalyptic number.

It is an amenable number.

124239009 is a deficient number, since it is larger than the sum of its proper divisors (51157311).

124239009 is a wasteful number, since it uses less digits than its factorization.

124239009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436079.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 124239009 is about 11146.2553801714. The cubic root of 124239009 is about 498.9832792927.

The spelling of 124239009 in words is "one hundred twenty-four million, two hundred thirty-nine thousand, nine".