1997560 has 16 divisors (see below), whose sum is σ = 4494600. Its totient is φ = 799008.

The previous prime is 1997557. The next prime is 1997587. The reversal of 1997560 is 657991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24930 + ... + 25009.

2^1997560 is an apocalyptic number.

1997560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1997560 is an abundant number, since it is smaller than the sum of its proper divisors (2497040).

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

1997560 is a wasteful number, since it uses less digits than its factorization.

1997560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49950 (or 49946 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 1997560 is about 1413.3506288250. The cubic root of 1997560 is about 125.9408473497.

It can be divided in two parts, 19 and 97560, that added together give a palindrome (97579).

The spelling of 1997560 in words is "one million, nine hundred ninety-seven thousand, five hundred sixty".