1680212 has 12 divisors (see below), whose sum is σ = 3113460. Its totient is φ = 790656.

The previous prime is 1680191. The next prime is 1680247. The reversal of 1680212 is 2120861.

It can be written as a sum of positive squares in 2 ways, for example, as 1223236 + 456976 = 1106^2 + 676^2 .

It is a super-2 number, since 2×1680212² = 5646224729888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12287 + ... + 12422.

It is an arithmetic number, because the mean of its divisors is an integer number (259455).

2^1680212 is an apocalyptic number.

It is an amenable number.

1680212 is a deficient number, since it is larger than the sum of its proper divisors (1433248).

1680212 is a wasteful number, since it uses less digits than its factorization.

1680212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24730 (or 24728 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1680212 is about 1296.2299178772. The cubic root of 1680212 is about 118.8834392872.

The spelling of 1680212 in words is "one million, six hundred eighty thousand, two hundred twelve".