997525 has 6 divisors (see below), whose sum is σ = 1236962. Its totient is φ = 798000.

The previous prime is 997511. The next prime is 997541. The reversal of 997525 is 525799.

It can be written as a sum of positive squares in 3 ways, for example, as 1521 + 996004 = 39^2 + 998^2 .

It is not a de Polignac number, because 997525 - 2⁹ = 997013 is a prime.

It is a super-2 number, since 2×997525² = 1990112251250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19926 + ... + 19975.

2⁹⁹⁷⁵²⁵ is an apocalyptic number.

It is an amenable number.

997525 is a deficient number, since it is larger than the sum of its proper divisors (239437).

997525 is a wasteful number, since it uses less digits than its factorization.

997525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39911 (or 39906 counting only the distinct ones).

The product of its digits is 28350, while the sum is 37.

The square root of 997525 is about 998.7617333478. The cubic root of 997525 is about 99.9174318438.

It can be divided in two parts, 9975 and 25, that added together give a 4-th power (10000 = 10⁴).

The spelling of 997525 in words is "nine hundred ninety-seven thousand, five hundred twenty-five".