9870212 has 18 divisors (see below), whose sum is σ = 18986814. Its totient is φ = 4486240.

The previous prime is 9870199. The next prime is 9870241. The reversal of 9870212 is 2120789.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8561476 + 1308736 = 2926^2 + 1144^2 .

It is an unprimeable 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 5 ways as a sum of consecutive naturals, for example, 9713 + ... + 10680.

It is an arithmetic number, because the mean of its divisors is an integer number (1054823).

Almost surely, 2^9870212 is an apocalyptic number.

It is an amenable number.

9870212 is a deficient number, since it is larger than the sum of its proper divisors (9116602).

9870212 is a wasteful number, since it uses less digits than its factorization.

9870212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20419 (or 20406 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 9870212 is about 3141.6893544716. The cubic root of 9870212 is about 214.5073414099.

The spelling of 9870212 in words is "nine million, eight hundred seventy thousand, two hundred twelve".