671622 has 16 divisors (see below), whose sum is σ = 1535232. Its totient is φ = 191880.

The previous prime is 671609. The next prime is 671633. The reversal of 671622 is 226176.

It is a happy number.

It is a super-2 number, since 2×671622² = 902152221768, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 671592 and 671601.

It is a congruent number.

It is an unprimeable number.

671622 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7954 + ... + 8037.

It is an arithmetic number, because the mean of its divisors is an integer number (95952).

2⁶⁷¹⁶²² is an apocalyptic number.

671622 is an abundant number, since it is smaller than the sum of its proper divisors (863610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671622 is a wasteful number, since it uses less digits than its factorization.

671622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16003.

The product of its digits is 1008, while the sum is 24.

The square root of 671622 is about 819.5254724534. The cubic root of 671622 is about 87.5739565207.

Adding to 671622 its reverse (226176), we get a palindrome (897798).

The spelling of 671622 in words is "six hundred seventy-one thousand, six hundred twenty-two".