42005255 has 4 divisors (see below), whose sum is σ = 50406312. Its totient is φ = 33604200.

The previous prime is 42005237. The next prime is 42005269. The reversal of 42005255 is 55250024.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42005255 - 2⁶ = 42005191 is a prime.

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 42005255.

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 3 ways as a sum of consecutive naturals, for example, 4200521 + ... + 4200530.

It is an arithmetic number, because the mean of its divisors is an integer number (12601578).

Almost surely, 2^42005255 is an apocalyptic number.

42005255 is a deficient number, since it is larger than the sum of its proper divisors (8401057).

42005255 is an equidigital number, since it uses as much as digits as its factorization.

42005255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8401056.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 42005255 is about 6481.1461177789. The cubic root of 42005255 is about 347.6171611222.

Adding to 42005255 its reverse (55250024), we get a palindrome (97255279).

The spelling of 42005255 in words is "forty-two million, five thousand, two hundred fifty-five".