4012543 has 4 divisors (see below), whose sum is σ = 4024080. Its totient is φ = 4001008.

The previous prime is 4012537. The next prime is 4012549. The reversal of 4012543 is 3452104.

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

It is an interprime number because it is at equal distance from previous prime (4012537) and next prime (4012549).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4012543 is a prime.

It is a super-2 number, since 2×4012543² = 32201002653698, which contains 22 as substring.

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 4012543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4012549) 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, 5230 + ... + 5947.

It is an arithmetic number, because the mean of its divisors is an integer number (1006020).

Almost surely, 2^4012543 is an apocalyptic number.

4012543 is a deficient number, since it is larger than the sum of its proper divisors (11537).

4012543 is a wasteful number, since it uses less digits than its factorization.

4012543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11536.

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

The square root of 4012543 is about 2003.1332956146. The cubic root of 4012543 is about 158.9058551622.

Adding to 4012543 its reverse (3452104), we get a palindrome (7464647).

The spelling of 4012543 in words is "four million, twelve thousand, five hundred forty-three".