997572 has 24 divisors (see below), whose sum is σ = 2368800. Its totient is φ = 326656.

The previous prime is 997553. The next prime is 997573. The reversal of 997572 is 275799.

997572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 997572.

It is not an unprimeable number, because it can be changed into a prime (997573) by changing a digit.

997572 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4 + ... + 1412.

It is an arithmetic number, because the mean of its divisors is an integer number (98700).

2⁹⁹⁷⁵⁷² is an apocalyptic number.

It is an amenable number.

997572 is an abundant number, since it is smaller than the sum of its proper divisors (1371228).

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

997572 is a wasteful number, since it uses less digits than its factorization.

997572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1473 counting only the distinct ones).

The product of its digits is 39690, while the sum is 39.

The square root of 997572 is about 998.7852622060. The cubic root of 997572 is about 99.9190010761.

The spelling of 997572 in words is "nine hundred ninety-seven thousand, five hundred seventy-two".