42001255 has 4 divisors (see below), whose sum is σ = 50401512. Its totient is φ = 33601000.

The previous prime is 42001247. The next prime is 42001259. The reversal of 42001255 is 55210024.

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

It is not a de Polignac number, because 42001255 - 2³ = 42001247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42001259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4200121 + ... + 4200130.

It is an arithmetic number, because the mean of its divisors is an integer number (12600378).

Almost surely, 2^42001255 is an apocalyptic number.

42001255 is a deficient number, since it is larger than the sum of its proper divisors (8400257).

42001255 is an equidigital number, since it uses as much as digits as its factorization.

42001255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400256.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 42001255 is about 6480.8375230367. The cubic root of 42001255 is about 347.6061266870.

Adding to 42001255 its reverse (55210024), we get a palindrome (97211279).

The spelling of 42001255 in words is "forty-two million, one thousand, two hundred fifty-five".