12143971 has 16 divisors (see below), whose sum is σ = 14450688. Its totient is φ = 9986400.

The previous prime is 12143969. The next prime is 12143981. The reversal of 12143971 is 17934121.

It is a cyclic number.

It is not a de Polignac number, because 12143971 - 2¹ = 12143969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12143981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41301 + ... + 41593.

It is an arithmetic number, because the mean of its divisors is an integer number (903168).

Almost surely, 2^12143971 is an apocalyptic number.

12143971 is a deficient number, since it is larger than the sum of its proper divisors (2306717).

12143971 is a wasteful number, since it uses less digits than its factorization.

12143971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its digits is 1512, while the sum is 28.

The square root of 12143971 is about 3484.8200814389. The cubic root of 12143971 is about 229.8547980805.

The spelling of 12143971 in words is "twelve million, one hundred forty-three thousand, nine hundred seventy-one".