829421 has 4 divisors (see below), whose sum is σ = 840000. Its totient is φ = 818844.

The previous prime is 829399. The next prime is 829453. The reversal of 829421 is 124928.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 829421 - 2¹⁰ = 828397 is a prime.

It is a Duffinian 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 829421.

It is not an unprimeable number, because it can be changed into a prime (829121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5171 + ... + 5328.

It is an arithmetic number, because the mean of its divisors is an integer number (210000).

2⁸²⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

829421 is a deficient number, since it is larger than the sum of its proper divisors (10579).

829421 is a wasteful number, since it uses less digits than its factorization.

829421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10578.

The product of its digits is 1152, while the sum is 26.

The square root of 829421 is about 910.7255349445. The cubic root of 829421 is about 93.9561059589.

The spelling of 829421 in words is "eight hundred twenty-nine thousand, four hundred twenty-one".