10402543 has 4 divisors (see below), whose sum is σ = 10423728. Its totient is φ = 10381360.

The previous prime is 10402529. The next prime is 10402549. The reversal of 10402543 is 34520401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10402543 - 2⁹ = 10402031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10402543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10402549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9838 + ... + 10843.

It is an arithmetic number, because the mean of its divisors is an integer number (2605932).

Almost surely, 2^10402543 is an apocalyptic number.

10402543 is a deficient number, since it is larger than the sum of its proper divisors (21185).

10402543 is an equidigital number, since it uses as much as digits as its factorization.

10402543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21184.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 10402543 is about 3225.2973506330. The cubic root of 10402543 is about 218.2963662655.

Adding to 10402543 its reverse (34520401), we get a palindrome (44922944).

The spelling of 10402543 in words is "ten million, four hundred two thousand, five hundred forty-three".