124432009 has 8 divisors (see below), whose sum is σ = 136201352. Its totient is φ = 112976640.

The previous prime is 124431991. The next prime is 124432013. The reversal of 124432009 is 900234421.

It can be written as a sum of positive squares in 4 ways, for example, as 2550409 + 121881600 = 1597^2 + 11040^2 .

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 124432009 - 2⁵ = 124431977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124432039) 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, 77664 + ... + 79249.

It is an arithmetic number, because the mean of its divisors is an integer number (17025169).

Almost surely, 2^124432009 is an apocalyptic number.

It is an amenable number.

124432009 is a deficient number, since it is larger than the sum of its proper divisors (11769343).

124432009 is a wasteful number, since it uses less digits than its factorization.

124432009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156987.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 124432009 is about 11154.9096365681. The cubic root of 124432009 is about 499.2415286910.

The spelling of 124432009 in words is "one hundred twenty-four million, four hundred thirty-two thousand, nine".