808542 has 80 divisors (see below), whose sum is σ = 2230272. Its totient is φ = 213840.

The previous prime is 808523. The next prime is 808553. The reversal of 808542 is 245808.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

808542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 39 ways as a sum of consecutive naturals, for example, 26067 + ... + 26097.

2⁸⁰⁸⁵⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 808542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1115136).

808542 is an abundant number, since it is smaller than the sum of its proper divisors (1421730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

808542 is a wasteful number, since it uses less digits than its factorization.

808542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 808542 is about 899.1896351716. The cubic root of 808542 is about 93.1610114018.

The spelling of 808542 in words is "eight hundred eight thousand, five hundred forty-two".