809742 has 16 divisors (see below), whose sum is σ = 1704960. Its totient is φ = 255672.

The previous prime is 809741. The next prime is 809747. The reversal of 809742 is 247908.

809742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3438 + ... + 3665.

It is an arithmetic number, because the mean of its divisors is an integer number (106560).

2⁸⁰⁹⁷⁴² is an apocalyptic number.

809742 is an abundant number, since it is smaller than the sum of its proper divisors (895218).

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

809742 is a wasteful number, since it uses less digits than its factorization.

809742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7127.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 809742 is about 899.8566552513. The cubic root of 809742 is about 93.2070770167.

It can be divided in two parts, 809 and 742, that added together give a palindrome (1551).

The spelling of 809742 in words is "eight hundred nine thousand, seven hundred forty-two".