84256871 has 4 divisors (see below), whose sum is σ = 84282744. Its totient is φ = 84231000.

The previous prime is 84256867. The next prime is 84256873. The reversal of 84256871 is 17865248.

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 84256871 - 2² = 84256867 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 (84256873) 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, 7205 + ... + 14846.

It is an arithmetic number, because the mean of its divisors is an integer number (21070686).

Almost surely, 2^84256871 is an apocalyptic number.

84256871 is a deficient number, since it is larger than the sum of its proper divisors (25873).

84256871 is a wasteful number, since it uses less digits than its factorization.

84256871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25872.

The product of its digits is 107520, while the sum is 41.

The square root of 84256871 is about 9179.1541549317. The cubic root of 84256871 is about 438.3978769605.

The spelling of 84256871 in words is "eighty-four million, two hundred fifty-six thousand, eight hundred seventy-one".