12421775 has 6 divisors (see below), whose sum is σ = 15403032. Its totient is φ = 9937400.

The previous prime is 12421757. The next prime is 12421789. The reversal of 12421775 is 57712421.

12421775 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12421775 - 2¹⁴ = 12405391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 248411 + ... + 248460.

It is an arithmetic number, because the mean of its divisors is an integer number (2567172).

Almost surely, 2^12421775 is an apocalyptic number.

12421775 is a deficient number, since it is larger than the sum of its proper divisors (2981257).

12421775 is an equidigital number, since it uses as much as digits as its factorization.

12421775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496881 (or 496876 counting only the distinct ones).

The product of its digits is 3920, while the sum is 29.

The square root of 12421775 is about 3524.4538584013. The cubic root of 12421775 is about 231.5943105700.

The spelling of 12421775 in words is "twelve million, four hundred twenty-one thousand, seven hundred seventy-five".