12402543 has 16 divisors (see below), whose sum is σ = 17372160. Its totient is φ = 7855584.

The previous prime is 12402527. The next prime is 12402547. The reversal of 12402543 is 34520421.

It is not a de Polignac number, because 12402543 - 2⁴ = 12402527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11418 + ... + 12456.

It is an arithmetic number, because the mean of its divisors is an integer number (1085760).

Almost surely, 2^12402543 is an apocalyptic number.

12402543 is a deficient number, since it is larger than the sum of its proper divisors (4969617).

12402543 is a wasteful number, since it uses less digits than its factorization.

12402543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 12402543 is about 3521.7244355571. The cubic root of 12402543 is about 231.4747269516.

Adding to 12402543 its reverse (34520421), we get a palindrome (46922964).

The spelling of 12402543 in words is "twelve million, four hundred two thousand, five hundred forty-three".