42042255 has 16 divisors (see below), whose sum is σ = 67350624. Its totient is φ = 22394880.

The previous prime is 42042227. The next prime is 42042263. The reversal of 42042255 is 55224024.

It is a happy number.

It is a Cunningham number, because it is equal to 6484²-1.

It is not a de Polignac number, because 42042255 - 2⁶ = 42042191 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 18375 + ... + 20535.

It is an arithmetic number, because the mean of its divisors is an integer number (4209414).

Almost surely, 2^42042255 is an apocalyptic number.

42042255 is a deficient number, since it is larger than the sum of its proper divisors (25308369).

42042255 is a wasteful number, since it uses less digits than its factorization.

42042255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 42042255 is about 6483.9999228871. Note that the first 4 decimals coincide. The cubic root of 42042255 is about 347.7191964540.

Adding to 42042255 its reverse (55224024), we get a palindrome (97266279).

The spelling of 42042255 in words is "forty-two million, forty-two thousand, two hundred fifty-five".