12139671 has 8 divisors (see below), whose sum is σ = 16451824. Its totient is φ = 7960320.

The previous prime is 12139637. The next prime is 12139679. The reversal of 12139671 is 17693121.

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

It is not a de Polignac number, because 12139671 - 2¹⁰ = 12138647 is a prime.

It is a super-2 number, since 2×12139671² = 294743223976482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139679) 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, 32986 + ... + 33351.

It is an arithmetic number, because the mean of its divisors is an integer number (2056478).

Almost surely, 2^12139671 is an apocalyptic number.

12139671 is a deficient number, since it is larger than the sum of its proper divisors (4312153).

12139671 is an equidigital number, since it uses as much as digits as its factorization.

12139671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66401.

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

The square root of 12139671 is about 3484.2030652647. The cubic root of 12139671 is about 229.8276654863.

The spelling of 12139671 in words is "twelve million, one hundred thirty-nine thousand, six hundred seventy-one".