40112491 has 2 divisors, whose sum is σ = 40112492. Its totient is φ = 40112490.

The previous prime is 40112461. The next prime is 40112509. The reversal of 40112491 is 19421104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40112491 - 2⁹ = 40111979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40112411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20056245 + 20056246.

It is an arithmetic number, because the mean of its divisors is an integer number (20056246).

Almost surely, 2^40112491 is an apocalyptic number.

40112491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40112491 is an equidigital number, since it uses as much as digits as its factorization.

40112491 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 22.

The square root of 40112491 is about 6333.4422709929. The cubic root of 40112491 is about 342.3154841108.

Adding to 40112491 its reverse (19421104), we get a palindrome (59533595).

The spelling of 40112491 in words is "forty million, one hundred twelve thousand, four hundred ninety-one".