124128959 has 4 divisors (see below), whose sum is σ = 124173816. Its totient is φ = 124084104.

The previous prime is 124128947. The next prime is 124128971. The reversal of 124128959 is 959821421.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (124128947) and next prime (124128971).

It is a cyclic number.

It is not a de Polignac number, because 124128959 - 2¹² = 124124863 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 (124128259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17984 + ... + 23909.

It is an arithmetic number, because the mean of its divisors is an integer number (31043454).

Almost surely, 2^124128959 is an apocalyptic number.

124128959 is a deficient number, since it is larger than the sum of its proper divisors (44857).

124128959 is an equidigital number, since it uses as much as digits as its factorization.

124128959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44856.

The product of its digits is 51840, while the sum is 41.

The square root of 124128959 is about 11141.3176509783. The cubic root of 124128959 is about 498.8359038637.

The spelling of 124128959 in words is "one hundred twenty-four million, one hundred twenty-eight thousand, nine hundred fifty-nine".