42011905 has 16 divisors (see below), whose sum is σ = 54452160. Its totient is φ = 30932928.

The previous prime is 42011897. The next prime is 42011911. The reversal of 42011905 is 50911024.

It is not a de Polignac number, because 42011905 - 2³ = 42011897 is a prime.

It is a super-3 number, since 3×42011905³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28066 + ... + 29524.

It is an arithmetic number, because the mean of its divisors is an integer number (3403260).

Almost surely, 2^42011905 is an apocalyptic number.

It is an amenable number.

42011905 is a deficient number, since it is larger than the sum of its proper divisors (12440255).

42011905 is a wasteful number, since it uses less digits than its factorization.

42011905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 42011905 is about 6481.6591240206. The cubic root of 42011905 is about 347.6355043203.

Adding to 42011905 its reverse (50911024), we get a palindrome (92922929).

The spelling of 42011905 in words is "forty-two million, eleven thousand, nine hundred five".