1997522 has 8 divisors (see below), whose sum is σ = 3066096. Its totient is φ = 975492.

The previous prime is 1997507. The next prime is 1997531. The reversal of 1997522 is 2257991.

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

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, 11528 + ... + 11699.

It is an arithmetic number, because the mean of its divisors is an integer number (383262).

2^1997522 is an apocalyptic number.

1997522 is a deficient number, since it is larger than the sum of its proper divisors (1068574).

1997522 is a wasteful number, since it uses less digits than its factorization.

1997522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23272.

The product of its digits is 11340, while the sum is 35.

The square root of 1997522 is about 1413.3371855293. The cubic root of 1997522 is about 125.9400487450.

The spelling of 1997522 in words is "one million, nine hundred ninety-seven thousand, five hundred twenty-two".