4040291 has 2 divisors, whose sum is σ = 4040292. Its totient is φ = 4040290.

The previous prime is 4040287. The next prime is 4040299. The reversal of 4040291 is 1920404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4040291 - 2² = 4040287 is a prime.

It is not a weakly prime, because it can be changed into another prime (4040299) 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, 2020145 + 2020146.

It is an arithmetic number, because the mean of its divisors is an integer number (2020146).

Almost surely, 2^4040291 is an apocalyptic number.

4040291 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040291 is an equidigital number, since it uses as much as digits as its factorization.

4040291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4040291 is about 2010.0475118763. The cubic root of 4040291 is about 159.2713087405.

Adding to 4040291 its reverse (1920404), we get a palindrome (5960695).

The spelling of 4040291 in words is "four million, forty thousand, two hundred ninety-one".