346821 has 8 divisors (see below), whose sum is σ = 465600. Its totient is φ = 229632.

The previous prime is 346793. The next prime is 346831. The reversal of 346821 is 128643.

It is a happy number.

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

It is not a de Polignac number, because 346821 - 2⁹ = 346309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 346791 and 346800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (346831) 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, 280 + ... + 878.

It is an arithmetic number, because the mean of its divisors is an integer number (58200).

2³⁴⁶⁸²¹ is an apocalyptic number.

It is an amenable number.

346821 is a deficient number, since it is larger than the sum of its proper divisors (118779).

346821 is a wasteful number, since it uses less digits than its factorization.

346821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its digits is 1152, while the sum is 24.

The square root of 346821 is about 588.9151042383. The cubic root of 346821 is about 70.2589726933.

The spelling of 346821 in words is "three hundred forty-six thousand, eight hundred twenty-one".