12440043 has 48 divisors (see below), whose sum is σ = 23212800. Its totient is φ = 6229440.

The previous prime is 12440027. The next prime is 12440053. The reversal of 12440043 is 34004421.

It is not a de Polignac number, because 12440043 - 2⁴ = 12440027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12439998 and 12440025.

It is not an unprimeable number, because it can be changed into a prime (12440053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19788 + ... + 20406.

It is an arithmetic number, because the mean of its divisors is an integer number (483600).

Almost surely, 2^12440043 is an apocalyptic number.

12440043 is a deficient number, since it is larger than the sum of its proper divisors (10772757).

12440043 is a wasteful number, since it uses less digits than its factorization.

12440043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12440043 is about 3527.0445134702. The cubic root of 12440043 is about 231.7077858336.

Adding to 12440043 its reverse (34004421), we get a palindrome (46444464).

The spelling of 12440043 in words is "twelve million, four hundred forty thousand, forty-three".