40034581 has 2 divisors, whose sum is σ = 40034582. Its totient is φ = 40034580.

The previous prime is 40034567. The next prime is 40034597. The reversal of 40034581 is 18543004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35343025 + 4691556 = 5945^2 + 2166^2 .

It is a cyclic number.

It is not a de Polignac number, because 40034581 - 2⁵ = 40034549 is a prime.

It is a super-2 number, since 2×40034581² = 3205535351691122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40034531) 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, 20017290 + 20017291.

It is an arithmetic number, because the mean of its divisors is an integer number (20017291).

Almost surely, 2^40034581 is an apocalyptic number.

It is an amenable number.

40034581 is a deficient number, since it is larger than the sum of its proper divisors (1).

40034581 is an equidigital number, since it uses as much as digits as its factorization.

40034581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 40034581 is about 6327.2885978119. The cubic root of 40034581 is about 342.0937154117.

Adding to 40034581 its reverse (18543004), we get a palindrome (58577585).

The spelling of 40034581 in words is "forty million, thirty-four thousand, five hundred eighty-one".