12143997 has 12 divisors (see below), whose sum is σ = 17698044. Its totient is φ = 8023680.

The previous prime is 12143993. The next prime is 12144007. The reversal of 12143997 is 79934121.

It can be written as a sum of positive squares in 2 ways, for example, as 1313316 + 10830681 = 1146^2 + 3291^2 .

It is not a de Polignac number, because 12143997 - 2² = 12143993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4954 + ... + 6987.

It is an arithmetic number, because the mean of its divisors is an integer number (1474837).

Almost surely, 2^12143997 is an apocalyptic number.

It is an amenable number.

12143997 is a deficient number, since it is larger than the sum of its proper divisors (5554047).

12143997 is a wasteful number, since it uses less digits than its factorization.

12143997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12060 (or 12057 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 12143997 is about 3484.8238119021. The cubic root of 12143997 is about 229.8549621186.

The spelling of 12143997 in words is "twelve million, one hundred forty-three thousand, nine hundred ninety-seven".