40412543 has 4 divisors (see below), whose sum is σ = 40730880. Its totient is φ = 40094208.

The previous prime is 40412531. The next prime is 40412549. The reversal of 40412543 is 34521404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40412543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40412549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158978 + ... + 159231.

It is an arithmetic number, because the mean of its divisors is an integer number (10182720).

Almost surely, 2^40412543 is an apocalyptic number.

40412543 is a deficient number, since it is larger than the sum of its proper divisors (318337).

40412543 is a wasteful number, since it uses less digits than its factorization.

40412543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318336.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40412543 is about 6357.0860462951. The cubic root of 40412543 is about 343.1669013519.

Adding to 40412543 its reverse (34521404), we get a palindrome (74933947).

The spelling of 40412543 in words is "forty million, four hundred twelve thousand, five hundred forty-three".