40435243 has 2 divisors, whose sum is σ = 40435244. Its totient is φ = 40435242.

The previous prime is 40435229. The next prime is 40435259. The reversal of 40435243 is 34253404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40435243 - 2⁹ = 40434731 is a prime.

It is not a weakly prime, because it can be changed into another prime (40435643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20217621 + 20217622.

It is an arithmetic number, because the mean of its divisors is an integer number (20217622).

Almost surely, 2^40435243 is an apocalyptic number.

40435243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40435243 is an equidigital number, since it uses as much as digits as its factorization.

40435243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 40435243 is about 6358.8712048602. The cubic root of 40435243 is about 343.2311423853.

Adding to 40435243 its reverse (34253404), we get a palindrome (74688647).

The spelling of 40435243 in words is "forty million, four hundred thirty-five thousand, two hundred forty-three".