124221639 has 8 divisors (see below), whose sum is σ = 174346240. Its totient is φ = 78455736.

The previous prime is 124221637. The next prime is 124221649. The reversal of 124221639 is 936122421.

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

It is not a de Polignac number, because 124221639 - 2¹ = 124221637 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 (124221637) 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 7 ways as a sum of consecutive naturals, for example, 1089607 + ... + 1089720.

It is an arithmetic number, because the mean of its divisors is an integer number (21793280).

Almost surely, 2^124221639 is an apocalyptic number.

124221639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

124221639 is a deficient number, since it is larger than the sum of its proper divisors (50124601).

124221639 is a wasteful number, since it uses less digits than its factorization.

124221639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179349.

The product of its digits is 5184, while the sum is 30.

The square root of 124221639 is about 11145.4761674861. The cubic root of 124221639 is about 498.9600237318.

The spelling of 124221639 in words is "one hundred twenty-four million, two hundred twenty-one thousand, six hundred thirty-nine".