40247081 has 12 divisors (see below), whose sum is σ = 46949760. Its totient is φ = 34400520.

The previous prime is 40247071. The next prime is 40247093. The reversal of 40247081 is 18074204.

40247081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40247081 - 2²² = 36052777 is a prime.

It is a super-2 number, since 2×40247081² = 3239655058041122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40247081.

It is not an unprimeable number, because it can be changed into a prime (40247071) 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 in 11 ways as a sum of consecutive naturals, for example, 20576 + ... + 22446.

It is an arithmetic number, because the mean of its divisors is an integer number (3912480).

Almost surely, 2^40247081 is an apocalyptic number.

It is an amenable number.

40247081 is a deficient number, since it is larger than the sum of its proper divisors (6702679).

40247081 is a wasteful number, since it uses less digits than its factorization.

40247081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40247081 is about 6344.0587166261. The cubic root of 40247081 is about 342.6979153415.

The spelling of 40247081 in words is "forty million, two hundred forty-seven thousand, eighty-one".