821334 has 8 divisors (see below), whose sum is σ = 1642680. Its totient is φ = 273776.

The previous prime is 821333. The next prime is 821377. The reversal of 821334 is 433128.

It is a happy number.

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

821334 is an admirable number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 821334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821333) 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, 68439 + ... + 68450.

It is an arithmetic number, because the mean of its divisors is an integer number (205335).

2⁸²¹³³⁴ is an apocalyptic number.

821334 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.

821334 is a wasteful number, since it uses less digits than its factorization.

821334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136894.

The product of its digits is 576, while the sum is 21.

The square root of 821334 is about 906.2747927643. The cubic root of 821334 is about 93.6497452719.

The spelling of 821334 in words is "eight hundred twenty-one thousand, three hundred thirty-four".