84128259 has 16 divisors (see below), whose sum is σ = 113363712. Its totient is φ = 55493088.

The previous prime is 84128251. The next prime is 84128263. The reversal of 84128259 is 95282148.

It is not a de Polignac number, because 84128259 - 2³ = 84128251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84128251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167002 + ... + 167504.

It is an arithmetic number, because the mean of its divisors is an integer number (7085232).

Almost surely, 2^84128259 is an apocalyptic number.

84128259 is a deficient number, since it is larger than the sum of its proper divisors (29235453).

84128259 is a wasteful number, since it uses less digits than its factorization.

84128259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its digits is 46080, while the sum is 39.

The square root of 84128259 is about 9172.1458230885. The cubic root of 84128259 is about 438.1747025189.

The spelling of 84128259 in words is "eighty-four million, one hundred twenty-eight thousand, two hundred fifty-nine".