671822 has 8 divisors (see below), whose sum is σ = 1018416. Its totient is φ = 332352.

The previous prime is 671791. The next prime is 671831. The reversal of 671822 is 228176.

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

It is a junction number, because it is equal to n+sod(n) for n = 671791 and 671800.

It is a congruent number.

It is an unprimeable number.

671822 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538 + ... + 1925.

It is an arithmetic number, because the mean of its divisors is an integer number (127302).

2⁶⁷¹⁸²² is an apocalyptic number.

671822 is a deficient number, since it is larger than the sum of its proper divisors (346594).

671822 is a wasteful number, since it uses less digits than its factorization.

671822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562.

The product of its digits is 1344, while the sum is 26.

The square root of 671822 is about 819.6474852032. The cubic root of 671822 is about 87.5826484402.

Adding to 671822 its reverse (228176), we get a palindrome (899998).

The spelling of 671822 in words is "six hundred seventy-one thousand, eight hundred twenty-two".