813842 has 8 divisors (see below), whose sum is σ = 1232496. Its totient is φ = 403012.

The previous prime is 813833. The next prime is 813847. The reversal of 813842 is 248318.

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

It is not an unprimeable number, because it can be changed into a prime (813847) 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, 1688 + ... + 2115.

It is an arithmetic number, because the mean of its divisors is an integer number (154062).

2⁸¹³⁸⁴² is an apocalyptic number.

813842 is a deficient number, since it is larger than the sum of its proper divisors (418654).

813842 is a wasteful number, since it uses less digits than its factorization.

813842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912.

The product of its digits is 1536, while the sum is 26.

The square root of 813842 is about 902.1319193998. The cubic root of 813842 is about 93.3641253277.

The spelling of 813842 in words is "eight hundred thirteen thousand, eight hundred forty-two".