12031671 has 8 divisors (see below), whose sum is σ = 16383744. Its totient is φ = 7850360.

The previous prime is 12031667. The next prime is 12031687. The reversal of 12031671 is 17613021.

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 12031671 - 2² = 12031667 is a prime.

It is a super-2 number, since 2×12031671² = 289522214104482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031651) 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, 42525 + ... + 42806.

It is an arithmetic number, because the mean of its divisors is an integer number (2047968).

Almost surely, 2^12031671 is an apocalyptic number.

12031671 is a deficient number, since it is larger than the sum of its proper divisors (4352073).

12031671 is an equidigital number, since it uses as much as digits as its factorization.

12031671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85381.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 12031671 is about 3468.6699179945. The cubic root of 12031671 is about 229.1440840484.

Adding to 12031671 its reverse (17613021), we get a palindrome (29644692).

The spelling of 12031671 in words is "twelve million, thirty-one thousand, six hundred seventy-one".