1997212 has 12 divisors (see below), whose sum is σ = 3994480. Its totient is φ = 855936.

The previous prime is 1997189. The next prime is 1997213. The reversal of 1997212 is 2127991.

1997212 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997213) 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, 35637 + ... + 35692.

2^1997212 is an apocalyptic number.

It is an amenable number.

1997212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1997212 is a wasteful number, since it uses less digits than its factorization.

1997212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71340 (or 71338 counting only the distinct ones).

The product of its digits is 2268, while the sum is 31.

The square root of 1997212 is about 1413.2275117616. The cubic root of 1997212 is about 125.9335334333.

It can be divided in two parts, 1997 and 212, that added together give a square (2209 = 47²).

The spelling of 1997212 in words is "one million, nine hundred ninety-seven thousand, two hundred twelve".