1997222 has 8 divisors (see below), whose sum is σ = 3008016. Its totient is φ = 994552.

The previous prime is 1997213. The next prime is 1997231. The reversal of 1997222 is 2227991.

It is an interprime number because it is at equal distance from previous prime (1997213) and next prime (1997231).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 1373 + ... + 2424.

It is an arithmetic number, because the mean of its divisors is an integer number (376002).

2^1997222 is an apocalyptic number.

1997222 is a deficient number, since it is larger than the sum of its proper divisors (1010794).

1997222 is a wasteful number, since it uses less digits than its factorization.

1997222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062.

The product of its digits is 4536, while the sum is 32.

The square root of 1997222 is about 1413.2310497580. The cubic root of 1997222 is about 125.9337436152.

The spelling of 1997222 in words is "one million, nine hundred ninety-seven thousand, two hundred twenty-two".