1997264 has 20 divisors (see below), whose sum is σ = 3961056. Its totient is φ = 975072.

The previous prime is 1997257. The next prime is 1997267. The reversal of 1997264 is 4627991.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764 + ... + 2139.

2^1997264 is an apocalyptic number.

It is an amenable number.

1997264 is a deficient number, since it is larger than the sum of its proper divisors (1963792).

1997264 is a wasteful number, since it uses less digits than its factorization.

1997264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954 (or 2948 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 1997264 is about 1413.2459092458. The cubic root of 1997264 is about 125.9346263714.

The spelling of 1997264 in words is "one million, nine hundred ninety-seven thousand, two hundred sixty-four".