42000287 has 4 divisors (see below), whose sum is σ = 48000336. Its totient is φ = 36000240.

The previous prime is 42000247. The next prime is 42000289. The reversal of 42000287 is 78200024.

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

It is a cyclic number.

It is not a de Polignac number, because 42000287 - 2¹² = 41996191 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 (42000289) 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, 3000014 + ... + 3000027.

It is an arithmetic number, because the mean of its divisors is an integer number (12000084).

Almost surely, 2^42000287 is an apocalyptic number.

42000287 is a deficient number, since it is larger than the sum of its proper divisors (6000049).

42000287 is an equidigital number, since it uses as much as digits as its factorization.

42000287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6000048.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 42000287 is about 6480.7628409008. The cubic root of 42000287 is about 347.6034562485.

The spelling of 42000287 in words is "forty-two million, two hundred eighty-seven", and thus it is an aban number.