40081061 has 4 divisors (see below), whose sum is σ = 40531500. Its totient is φ = 39630624.

The previous prime is 40081043. The next prime is 40081081. The reversal of 40081061 is 16018004.

40081061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4452100 + 35628961 = 2110^2 + 5969^2 .

It is a cyclic number.

It is not a de Polignac number, because 40081061 - 2²² = 35886757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40081021) 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 3 ways as a sum of consecutive naturals, for example, 225086 + ... + 225263.

It is an arithmetic number, because the mean of its divisors is an integer number (10132875).

Almost surely, 2^40081061 is an apocalyptic number.

It is an amenable number.

40081061 is a deficient number, since it is larger than the sum of its proper divisors (450439).

40081061 is an equidigital number, since it uses as much as digits as its factorization.

40081061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450438.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 40081061 is about 6330.9605116443. The cubic root of 40081061 is about 342.2260540548.

Adding to 40081061 its reverse (16018004), we get a palindrome (56099065).

The spelling of 40081061 in words is "forty million, eighty-one thousand, sixty-one".