124839945 has 24 divisors (see below), whose sum is σ = 223372032. Its totient is φ = 64432800.

The previous prime is 124839901. The next prime is 124839971. The reversal of 124839945 is 549938421.

It is not a de Polignac number, because 124839945 - 2⁷ = 124839817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 124839945.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43351 + ... + 46140.

It is an arithmetic number, because the mean of its divisors is an integer number (9307168).

Almost surely, 2^124839945 is an apocalyptic number.

124839945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

124839945 is a deficient number, since it is larger than the sum of its proper divisors (98532087).

124839945 is a wasteful number, since it uses less digits than its factorization.

124839945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89533 (or 89530 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 124839945 is about 11173.1797175200. The cubic root of 124839945 is about 499.7865021837.

The spelling of 124839945 in words is "one hundred twenty-four million, eight hundred thirty-nine thousand, nine hundred forty-five".