124339987 has 4 divisors (see below), whose sum is σ = 124400520. Its totient is φ = 124279456.

The previous prime is 124339981. The next prime is 124339991. The reversal of 124339987 is 789933421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789933421 = 947 ⋅834143.

It is a cyclic number.

It is not a de Polignac number, because 124339987 - 2²³ = 115951379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124339981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27073 + ... + 31330.

It is an arithmetic number, because the mean of its divisors is an integer number (31100130).

Almost surely, 2^124339987 is an apocalyptic number.

124339987 is a deficient number, since it is larger than the sum of its proper divisors (60533).

124339987 is an equidigital number, since it uses as much as digits as its factorization.

124339987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60532.

The product of its digits is 326592, while the sum is 46.

The square root of 124339987 is about 11150.7841428305. The cubic root of 124339987 is about 499.1184292462.

The spelling of 124339987 in words is "one hundred twenty-four million, three hundred thirty-nine thousand, nine hundred eighty-seven".