12421759 has 8 divisors (see below), whose sum is σ = 14238720. Its totient is φ = 10615416.

The previous prime is 12421757. The next prime is 12421789. The reversal of 12421759 is 95712421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12421759 - 2¹ = 12421757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12421759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 4984.

It is an arithmetic number, because the mean of its divisors is an integer number (1779840).

Almost surely, 2^12421759 is an apocalyptic number.

12421759 is a deficient number, since it is larger than the sum of its proper divisors (1816961).

12421759 is an equidigital number, since it uses as much as digits as its factorization.

12421759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5309.

The product of its digits is 5040, while the sum is 31.

The square root of 12421759 is about 3524.4515885454. The cubic root of 12421759 is about 231.5942111342.

The spelling of 12421759 in words is "twelve million, four hundred twenty-one thousand, seven hundred fifty-nine".