12420875 has 8 divisors (see below), whose sum is σ = 15501408. Its totient is φ = 9936600.

The previous prime is 12420871. The next prime is 12420887. The reversal of 12420875 is 57802421.

It is not a de Polignac number, because 12420875 - 2² = 12420871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12420871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49559 + ... + 49808.

It is an arithmetic number, because the mean of its divisors is an integer number (1937676).

Almost surely, 2^12420875 is an apocalyptic number.

12420875 is a deficient number, since it is larger than the sum of its proper divisors (3080533).

12420875 is an frugal number, since it uses more digits than its factorization.

12420875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99382 (or 99372 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12420875 is about 3524.3261767322. The cubic root of 12420875 is about 231.5887171688.

The spelling of 12420875 in words is "twelve million, four hundred twenty thousand, eight hundred seventy-five".