12139617 has 8 divisors (see below), whose sum is σ = 18498496. Its totient is φ = 6936912.

The previous prime is 12139609. The next prime is 12139619. The reversal of 12139617 is 71693121.

12139617 is digitally balanced in base 2 and base 4, because in such bases 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 not a de Polignac number, because 12139617 - 2³ = 12139609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12139619) 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, 289018 + ... + 289059.

It is an arithmetic number, because the mean of its divisors is an integer number (2312312).

Almost surely, 2^12139617 is an apocalyptic number.

It is an amenable number.

12139617 is a deficient number, since it is larger than the sum of its proper divisors (6358879).

12139617 is an equidigital number, since it uses as much as digits as its factorization.

12139617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578087.

The product of its digits is 2268, while the sum is 30.

The square root of 12139617 is about 3484.1953159948. The cubic root of 12139617 is about 229.8273247107.

The spelling of 12139617 in words is "twelve million, one hundred thirty-nine thousand, six hundred seventeen".