671612 has 12 divisors (see below), whose sum is σ = 1237320. Its totient is φ = 318096.

The previous prime is 671609. The next prime is 671633. The reversal of 671612 is 216176.

It is a congruent number.

It is an unprimeable number.

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, 4343 + ... + 4494.

It is an arithmetic number, because the mean of its divisors is an integer number (103110).

2⁶⁷¹⁶¹² is an apocalyptic number.

It is an amenable number.

671612 is a deficient number, since it is larger than the sum of its proper divisors (565708).

671612 is a wasteful number, since it uses less digits than its factorization.

671612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8860 (or 8858 counting only the distinct ones).

The product of its digits is 504, while the sum is 23.

The square root of 671612 is about 819.5193713391. The cubic root of 671612 is about 87.5735218794.

Adding to 671612 its reverse (216176), we get a palindrome (887788).

The spelling of 671612 in words is "six hundred seventy-one thousand, six hundred twelve".