12420985 has 4 divisors (see below), whose sum is σ = 14905188. Its totient is φ = 9936784.

The previous prime is 12420979. The next prime is 12421007. The reversal of 12420985 is 58902421.

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 5645376 + 6775609 = 2376^2 + 2603^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420985 - 2¹¹ = 12418937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242094 + ... + 1242103.

It is an arithmetic number, because the mean of its divisors is an integer number (3726297).

Almost surely, 2^12420985 is an apocalyptic number.

It is an amenable number.

12420985 is a deficient number, since it is larger than the sum of its proper divisors (2484203).

12420985 is an equidigital number, since it uses as much as digits as its factorization.

12420985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484202.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 12420985 is about 3524.3417825177. The cubic root of 12420985 is about 231.5894008213.

The spelling of 12420985 in words is "twelve million, four hundred twenty thousand, nine hundred eighty-five".