12439861 has 8 divisors (see below), whose sum is σ = 14313600. Its totient is φ = 10590288.

The previous prime is 12439841. The next prime is 12439871. The reversal of 12439861 is 16893421.

12439861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12439861 - 2⁵ = 12439829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4921 + ... + 7006.

It is an arithmetic number, because the mean of its divisors is an integer number (1789200).

Almost surely, 2^12439861 is an apocalyptic number.

It is an amenable number.

12439861 is a deficient number, since it is larger than the sum of its proper divisors (1873739).

12439861 is a wasteful number, since it uses less digits than its factorization.

12439861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12083.

The product of its digits is 10368, while the sum is 34.

The square root of 12439861 is about 3527.0187127374. The cubic root of 12439861 is about 231.7066558530.

The spelling of 12439861 in words is "twelve million, four hundred thirty-nine thousand, eight hundred sixty-one".