12289942 has 8 divisors (see below), whose sum is σ = 21068496. Its totient is φ = 5267112.

The previous prime is 12289931. The next prime is 12289943. The reversal of 12289942 is 24998221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438913 + ... + 438940.

It is an arithmetic number, because the mean of its divisors is an integer number (2633562).

Almost surely, 2^12289942 is an apocalyptic number.

12289942 is a deficient number, since it is larger than the sum of its proper divisors (8778554).

12289942 is an equidigital number, since it uses as much as digits as its factorization.

12289942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877862.

The product of its digits is 20736, while the sum is 37.

The square root of 12289942 is about 3505.7013563622. The cubic root of 12289942 is about 230.7720870701.

It can be divided in two parts, 12289 and 942, that added together give a palindrome (13231).

The spelling of 12289942 in words is "twelve million, two hundred eighty-nine thousand, nine hundred forty-two".