40304261 has 2 divisors, whose sum is σ = 40304262. Its totient is φ = 40304260.

The previous prime is 40304237. The next prime is 40304269. The reversal of 40304261 is 16240304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34692100 + 5612161 = 5890^2 + 2369^2 .

It is a cyclic number.

It is not a de Polignac number, because 40304261 - 2⁶ = 40304197 is a prime.

It is a super-2 number, since 2×40304261² = 3248866909512242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40304269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20152130 + 20152131.

It is an arithmetic number, because the mean of its divisors is an integer number (20152131).

Almost surely, 2^40304261 is an apocalyptic number.

It is an amenable number.

40304261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40304261 is an equidigital number, since it uses as much as digits as its factorization.

40304261 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 20.

The square root of 40304261 is about 6348.5636958292. The cubic root of 40304261 is about 342.8601316125.

Adding to 40304261 its reverse (16240304), we get a palindrome (56544565).

The spelling of 40304261 in words is "forty million, three hundred four thousand, two hundred sixty-one".