40321243 has 2 divisors, whose sum is σ = 40321244. Its totient is φ = 40321242.

The previous prime is 40321241. The next prime is 40321261. The reversal of 40321243 is 34212304.

40321243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40321243 - 2¹ = 40321241 is a prime.

Together with 40321241, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40321243.

It is not a weakly prime, because it can be changed into another prime (40321241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160621 + 20160622.

It is an arithmetic number, because the mean of its divisors is an integer number (20160622).

Almost surely, 2^40321243 is an apocalyptic number.

40321243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40321243 is an equidigital number, since it uses as much as digits as its factorization.

40321243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40321243 is about 6349.9010228507. The cubic root of 40321243 is about 342.9082789882.

Adding to 40321243 its reverse (34212304), we get a palindrome (74533547).

The spelling of 40321243 in words is "forty million, three hundred twenty-one thousand, two hundred forty-three".