40262591 has 2 divisors, whose sum is σ = 40262592. Its totient is φ = 40262590.

The previous prime is 40262561. The next prime is 40262611. The reversal of 40262591 is 19526204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40262591 - 2²² = 36068287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40262561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20131295 + 20131296.

It is an arithmetic number, because the mean of its divisors is an integer number (20131296).

Almost surely, 2^40262591 is an apocalyptic number.

40262591 is a deficient number, since it is larger than the sum of its proper divisors (1).

40262591 is an equidigital number, since it uses as much as digits as its factorization.

40262591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 40262591 is about 6345.2810024458. The cubic root of 40262591 is about 342.7419314697.

Adding to 40262591 its reverse (19526204), we get a palindrome (59788795).

The spelling of 40262591 in words is "forty million, two hundred sixty-two thousand, five hundred ninety-one".