670212 has 18 divisors (see below), whose sum is σ = 1694238. Its totient is φ = 223392.

The previous prime is 670211. The next prime is 670217. The reversal of 670212 is 212076.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 665856 + 4356 = 816^2 + 66^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670212.

It is not an unprimeable number, because it can be changed into a prime (670211) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 9273 + ... + 9344.

2⁶⁷⁰²¹² is an apocalyptic number.

It is an amenable number.

670212 is an abundant number, since it is smaller than the sum of its proper divisors (1024026).

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

670212 is a wasteful number, since it uses less digits than its factorization.

670212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18627 (or 18622 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 670212 is about 818.6647665559. The cubic root of 670212 is about 87.5126294695.

Adding to 670212 its reverse (212076), we get a palindrome (882288).

The spelling of 670212 in words is "six hundred seventy thousand, two hundred twelve".