124756434421 has 4 divisors (see below), whose sum is σ = 125389716012. Its totient is φ = 124123152832.

The previous prime is 124756434419. The next prime is 124756434433. The reversal of 124756434421 is 124434657421.

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 121344239025 + 3412195396 = 348345^2 + 58414^2 .

It is a cyclic number.

It is not a de Polignac number, because 124756434421 - 2¹ = 124756434419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124756134421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316640500 + ... + 316640893.

It is an arithmetic number, because the mean of its divisors is an integer number (31347429003).

Almost surely, 2^124756434421 is an apocalyptic number.

It is an amenable number.

124756434421 is a deficient number, since it is larger than the sum of its proper divisors (633281591).

124756434421 is an equidigital number, since it uses as much as digits as its factorization.

124756434421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633281590.

The product of its digits is 645120, while the sum is 43.

The spelling of 124756434421 in words is "one hundred twenty-four billion, seven hundred fifty-six million, four hundred thirty-four thousand, four hundred twenty-one".