12439091 has 24 divisors (see below), whose sum is σ = 15759360. Its totient is φ = 9752400.

The previous prime is 12439081. The next prime is 12439093. The reversal of 12439091 is 19093421.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12439091 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12439093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28646 + ... + 29076.

It is an arithmetic number, because the mean of its divisors is an integer number (656640).

Almost surely, 2^12439091 is an apocalyptic number.

12439091 is a deficient number, since it is larger than the sum of its proper divisors (3320269).

12439091 is a wasteful number, since it uses less digits than its factorization.

12439091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 12439091 is about 3526.9095537028. The cubic root of 12439091 is about 231.7018750438.

The spelling of 12439091 in words is "twelve million, four hundred thirty-nine thousand, ninety-one".