809142 has 8 divisors (see below), whose sum is σ = 1618296. Its totient is φ = 269712.

The previous prime is 809141. The next prime is 809143. The reversal of 809142 is 241908.

809142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (809141) and next prime (809143).

It is a sphenic number, since it is the product of 3 distinct primes.

809142 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 809142.

It is not an unprimeable number, because it can be changed into a prime (809141) 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, 67423 + ... + 67434.

It is an arithmetic number, because the mean of its divisors is an integer number (202287).

2⁸⁰⁹¹⁴² is an apocalyptic number.

809142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

809142 is a wasteful number, since it uses less digits than its factorization.

809142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134862.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 809142 is about 899.5232070380. The cubic root of 809142 is about 93.1840499024.

The spelling of 809142 in words is "eight hundred nine thousand, one hundred forty-two".