12420245 has 4 divisors (see below), whose sum is σ = 14904300. Its totient is φ = 9936192.

The previous prime is 12420229. The next prime is 12420257. The reversal of 12420245 is 54202421.

It is a happy number.

12420245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 6461764 + 5958481 = 2542^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420245 - 2⁴ = 12420229 is a prime.

It is a congruent 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, 1242020 + ... + 1242029.

It is an arithmetic number, because the mean of its divisors is an integer number (3726075).

Almost surely, 2^12420245 is an apocalyptic number.

It is an amenable number.

12420245 is a deficient number, since it is larger than the sum of its proper divisors (2484055).

12420245 is an equidigital number, since it uses as much as digits as its factorization.

12420245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484054.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 12420245 is about 3524.2367968115. The cubic root of 12420245 is about 231.5848016272.

Adding to 12420245 its reverse (54202421), we get a palindrome (66622666).

The spelling of 12420245 in words is "twelve million, four hundred twenty thousand, two hundred forty-five".