42865287 has 16 divisors (see below), whose sum is σ = 58514400. Its totient is φ = 27901952.

The previous prime is 42865271. The next prime is 42865289. The reversal of 42865287 is 78256824.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42865287 - 2⁴ = 42865271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42865289) by changing a digit.

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, 40339 + ... + 41387.

It is an arithmetic number, because the mean of its divisors is an integer number (3657150).

Almost surely, 2^42865287 is an apocalyptic number.

42865287 is a deficient number, since it is larger than the sum of its proper divisors (15649113).

42865287 is a wasteful number, since it uses less digits than its factorization.

42865287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362.

The product of its digits is 215040, while the sum is 42.

The square root of 42865287 is about 6547.1586967172. The cubic root of 42865287 is about 349.9735680719.

The spelling of 42865287 in words is "forty-two million, eight hundred sixty-five thousand, two hundred eighty-seven".