12245639 has 6 divisors (see below), whose sum is σ = 14244984. Its totient is φ = 10496220.

The previous prime is 12245621. The next prime is 12245641. The reversal of 12245639 is 93654221.

It is a happy number.

12245639 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 12245639 - 2²⁰ = 11197063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12245539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124907 + ... + 125004.

It is an arithmetic number, because the mean of its divisors is an integer number (2374164).

Almost surely, 2^12245639 is an apocalyptic number.

12245639 is a deficient number, since it is larger than the sum of its proper divisors (1999345).

12245639 is an equidigital number, since it uses as much as digits as its factorization.

12245639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249925 (or 249918 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 12245639 is about 3499.3769445431. The cubic root of 12245639 is about 230.4944561008.

The spelling of 12245639 in words is "twelve million, two hundred forty-five thousand, six hundred thirty-nine".