997425 has 72 divisors (see below), whose sum is σ = 2166528. Its totient is φ = 432000.

The previous prime is 997391. The next prime is 997427. The reversal of 997425 is 524799.

997425 = 116² + 117² + ... + 165².

997425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 997425 - 2¹¹ = 995377 is a prime.

Its product of digits (22680) is a multiple of the sum of its prime divisors (63).

It is a self number, because there is not a number n which added to its sum of digits gives 997425.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997425.

It is not an unprimeable number, because it can be changed into a prime (997427) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 32160 + ... + 32190.

2⁹⁹⁷⁴²⁵ is an apocalyptic number.

It is an amenable number.

997425 is an abundant number, since it is smaller than the sum of its proper divisors (1169103).

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

997425 is a wasteful number, since it uses less digits than its factorization.

997425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 63 counting only the distinct ones).

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

The square root of 997425 is about 998.7116701030. The cubic root of 997425 is about 99.9140928875.

It can be divided in two parts, 9974 and 25, that added together give a palindrome (9999).

The spelling of 997425 in words is "nine hundred ninety-seven thousand, four hundred twenty-five".