1997575 has 6 divisors (see below), whose sum is σ = 2477024. Its totient is φ = 1598040.

The previous prime is 1997557. The next prime is 1997587. The reversal of 1997575 is 5757991.

It is not a de Polignac number, because 1997575 - 2⁵ = 1997543 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 39927 + ... + 39976.

2^1997575 is an apocalyptic number.

1997575 is a deficient number, since it is larger than the sum of its proper divisors (479449).

1997575 is an equidigital number, since it uses as much as digits as its factorization.

1997575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79913 (or 79908 counting only the distinct ones).

The product of its digits is 99225, while the sum is 43.

The square root of 1997575 is about 1413.3559353539. The cubic root of 1997575 is about 125.9411625856.

The spelling of 1997575 in words is "one million, nine hundred ninety-seven thousand, five hundred seventy-five".