84256427 has 4 divisors (see below), whose sum is σ = 84332976. Its totient is φ = 84179880.

The previous prime is 84256421. The next prime is 84256439. The reversal of 84256427 is 72465248.

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 84256427 - 2⁴ = 84256411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84256421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36599 + ... + 38832.

It is an arithmetic number, because the mean of its divisors is an integer number (21083244).

Almost surely, 2^84256427 is an apocalyptic number.

84256427 is a deficient number, since it is larger than the sum of its proper divisors (76549).

84256427 is a wasteful number, since it uses less digits than its factorization.

84256427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76548.

The product of its digits is 107520, while the sum is 38.

The square root of 84256427 is about 9179.1299696649. The cubic root of 84256427 is about 438.3971068987.

The spelling of 84256427 in words is "eighty-four million, two hundred fifty-six thousand, four hundred twenty-seven".