997212 has 12 divisors (see below), whose sum is σ = 2326856. Its totient is φ = 332400.

The previous prime is 997207. The next prime is 997219. The reversal of 997212 is 212799.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 997212.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997212.

It is not an unprimeable number, because it can be changed into a prime (997219) by changing a digit.

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, 41539 + ... + 41562.

2⁹⁹⁷²¹² is an apocalyptic number.

It is an amenable number.

997212 is an abundant number, since it is smaller than the sum of its proper divisors (1329644).

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

997212 is a wasteful number, since it uses less digits than its factorization.

997212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83108 (or 83106 counting only the distinct ones).

The product of its digits is 2268, while the sum is 30.

The square root of 997212 is about 998.6050270252. The cubic root of 997212 is about 99.9069801666.

The spelling of 997212 in words is "nine hundred ninety-seven thousand, two hundred twelve".