40501291 has 2 divisors, whose sum is σ = 40501292. Its totient is φ = 40501290.

The previous prime is 40501289. The next prime is 40501301. The reversal of 40501291 is 19210504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40501291 - 2¹ = 40501289 is a prime.

Together with 40501289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40501231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20250645 + 20250646.

It is an arithmetic number, because the mean of its divisors is an integer number (20250646).

Almost surely, 2^40501291 is an apocalyptic number.

40501291 is a deficient number, since it is larger than the sum of its proper divisors (1).

40501291 is an equidigital number, since it uses as much as digits as its factorization.

40501291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 40501291 is about 6364.0624604100. The cubic root of 40501291 is about 343.4179216805.

Adding to 40501291 its reverse (19210504), we get a palindrome (59711795).

The spelling of 40501291 in words is "forty million, five hundred one thousand, two hundred ninety-one".