124392005 has 4 divisors (see below), whose sum is σ = 149270412. Its totient is φ = 99513600.

The previous prime is 124391987. The next prime is 124392013. The reversal of 124392005 is 500293421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500293421 = 11173 ⋅44777.

It can be written as a sum of positive squares in 2 ways, for example, as 83649316 + 40742689 = 9146^2 + 6383^2 .

It is not a de Polignac number, because 124392005 - 2¹² = 124387909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12439196 + ... + 12439205.

It is an arithmetic number, because the mean of its divisors is an integer number (37317603).

Almost surely, 2^124392005 is an apocalyptic number.

It is an amenable number.

124392005 is a deficient number, since it is larger than the sum of its proper divisors (24878407).

124392005 is an equidigital number, since it uses as much as digits as its factorization.

124392005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24878406.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 124392005 is about 11153.1163806355. The cubic root of 124392005 is about 499.1880220976.

The spelling of 124392005 in words is "one hundred twenty-four million, three hundred ninety-two thousand, five".