124421139 has 18 divisors (see below), whose sum is σ = 189400380. Its totient is φ = 78489648.

The previous prime is 124421137. The next prime is 124421149. The reversal of 124421139 is 931124421.

It is a happy number.

It is not a de Polignac number, because 124421139 - 2¹ = 124421137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124421137) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 145437 + ... + 146289.

Almost surely, 2^124421139 is an apocalyptic number.

124421139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

124421139 is a deficient number, since it is larger than the sum of its proper divisors (64979241).

124421139 is an frugal number, since it uses more digits than its factorization.

124421139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731 (or 875 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 124421139 is about 11154.4223965206. The cubic root of 124421139 is about 499.2269908630.

The spelling of 124421139 in words is "one hundred twenty-four million, four hundred twenty-one thousand, one hundred thirty-nine".