12431643 has 24 divisors (see below), whose sum is σ = 20301120. Its totient is φ = 6728400.

The previous prime is 12431621. The next prime is 12431663. The reversal of 12431643 is 34613421.

It is not a de Polignac number, because 12431643 - 2⁵ = 12431611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12431663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 568 + ... + 5018.

It is an arithmetic number, because the mean of its divisors is an integer number (845880).

Almost surely, 2^12431643 is an apocalyptic number.

12431643 is a deficient number, since it is larger than the sum of its proper divisors (7869477).

12431643 is a wasteful number, since it uses less digits than its factorization.

12431643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487 (or 4480 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 12431643 is about 3525.8535136900. The cubic root of 12431643 is about 231.6556213931.

The spelling of 12431643 in words is "twelve million, four hundred thirty-one thousand, six hundred forty-three".