124404112505 has 4 divisors (see below), whose sum is σ = 149284935012. Its totient is φ = 99523290000.

The previous prime is 124404112489. The next prime is 124404112523. The reversal of 124404112505 is 505211404421.

It is a happy number.

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 21044434489 + 103359678016 = 145067^2 + 321496^2 .

It is not a de Polignac number, because 124404112505 - 2⁴ = 124404112489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12440411246 + ... + 12440411255.

It is an arithmetic number, because the mean of its divisors is an integer number (37321233753).

Almost surely, 2^124404112505 is an apocalyptic number.

It is an amenable number.

124404112505 is a deficient number, since it is larger than the sum of its proper divisors (24880822507).

124404112505 is an equidigital number, since it uses as much as digits as its factorization.

124404112505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24880822506.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 124404112505 its reverse (505211404421), we get a palindrome (629615516926).

The spelling of 124404112505 in words is "one hundred twenty-four billion, four hundred four million, one hundred twelve thousand, five hundred five".