997524 has 54 divisors (see below), whose sum is σ = 2783690. Its totient is φ = 300960.

The previous prime is 997511. The next prime is 997541. The reversal of 997524 is 425799.

997524 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 17424 = 990^2 + 132^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4242 + ... + 4470.

2⁹⁹⁷⁵²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1391845).

997524 is an abundant number, since it is smaller than the sum of its proper divisors (1786166).

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

997524 is a wasteful number, since it uses less digits than its factorization.

997524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 245 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 997524 is about 998.7612327278. The cubic root of 997524 is about 99.9173984553.

It can be divided in two parts, 9975 and 24, that added together give a palindrome (9999).

The spelling of 997524 in words is "nine hundred ninety-seven thousand, five hundred twenty-four".