40042085 has 8 divisors (see below), whose sum is σ = 48546456. Its totient is φ = 31703040.

The previous prime is 40042043. The next prime is 40042099. The reversal of 40042085 is 58024004.

It can be written as a sum of positive squares in 4 ways, for example, as 8491396 + 31550689 = 2914^2 + 5617^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40042085 - 2¹⁶ = 39976549 is a prime.

It is a super-2 number, since 2×40042085² = 3206737142294450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40042085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40796 + ... + 41765.

It is an arithmetic number, because the mean of its divisors is an integer number (6068307).

Almost surely, 2^40042085 is an apocalyptic number.

It is an amenable number.

40042085 is a deficient number, since it is larger than the sum of its proper divisors (8504371).

40042085 is an equidigital number, since it uses as much as digits as its factorization.

40042085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82663.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 40042085 is about 6327.8815570458. The cubic root of 40042085 is about 342.1150878586.

Adding to 40042085 its reverse (58024004), we get a palindrome (98066089).

The spelling of 40042085 in words is "forty million, forty-two thousand, eighty-five".