40562491 has 2 divisors, whose sum is σ = 40562492. Its totient is φ = 40562490.

The previous prime is 40562449. The next prime is 40562521. The reversal of 40562491 is 19426504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40562491 is a prime.

It is a super-2 number, since 2×40562491² = 3290631352250162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40562191) 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, 20281245 + 20281246.

It is an arithmetic number, because the mean of its divisors is an integer number (20281246).

Almost surely, 2^40562491 is an apocalyptic number.

40562491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40562491 is an equidigital number, since it uses as much as digits as its factorization.

40562491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 40562491 is about 6368.8688948667. The cubic root of 40562491 is about 343.5908099933.

Adding to 40562491 its reverse (19426504), we get a palindrome (59988995).

The spelling of 40562491 in words is "forty million, five hundred sixty-two thousand, four hundred ninety-one".