124040305 has 4 divisors (see below), whose sum is σ = 148848372. Its totient is φ = 99232240.

The previous prime is 124040281. The next prime is 124040327. The reversal of 124040305 is 503040421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88435216 + 35605089 = 9404^2 + 5967^2 .

It is not a de Polignac number, because 124040305 - 2²¹ = 121943153 is a prime.

It is a Duffinian 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, 12404026 + ... + 12404035.

It is an arithmetic number, because the mean of its divisors is an integer number (37212093).

Almost surely, 2^124040305 is an apocalyptic number.

It is an amenable number.

124040305 is a deficient number, since it is larger than the sum of its proper divisors (24808067).

124040305 is an equidigital number, since it uses as much as digits as its factorization.

124040305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24808066.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 124040305 is about 11137.3383265482. The cubic root of 124040305 is about 498.7171179089.

Adding to 124040305 its reverse (503040421), we get a palindrome (627080726).

The spelling of 124040305 in words is "one hundred twenty-four million, forty thousand, three hundred five".