40042055 has 16 divisors (see below), whose sum is σ = 51041664. Its totient is φ = 30051840.

The previous prime is 40042043. The next prime is 40042099. The reversal of 40042055 is 55024004.

It is a happy number.

It is not a de Polignac number, because 40042055 - 2⁴ = 40042039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36089 + ... + 37181.

It is an arithmetic number, because the mean of its divisors is an integer number (3190104).

Almost surely, 2^40042055 is an apocalyptic number.

40042055 is a deficient number, since it is larger than the sum of its proper divisors (10999609).

40042055 is a wasteful number, since it uses less digits than its factorization.

40042055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40042055 is about 6327.8791865838. The cubic root of 40042055 is about 342.1150024197.

Adding to 40042055 its reverse (55024004), we get a palindrome (95066059).

The spelling of 40042055 in words is "forty million, forty-two thousand, fifty-five".