40420543 has 8 divisors (see below), whose sum is σ = 45051120. Its totient is φ = 36040320.

The previous prime is 40420531. The next prime is 40420553. The reversal of 40420543 is 34502404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40420543 - 2¹⁷ = 40289471 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 (40420553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62248 + ... + 62893.

It is an arithmetic number, because the mean of its divisors is an integer number (5631390).

Almost surely, 2^40420543 is an apocalyptic number.

40420543 is a deficient number, since it is larger than the sum of its proper divisors (4630577).

40420543 is a wasteful number, since it uses less digits than its factorization.

40420543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125177.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 40420543 is about 6357.7152342646. The cubic root of 40420543 is about 343.1895441082.

Adding to 40420543 its reverse (34502404), we get a palindrome (74922947).

The spelling of 40420543 in words is "forty million, four hundred twenty thousand, five hundred forty-three".