525997 has 4 divisors (see below), whose sum is σ = 556956. Its totient is φ = 495040.

The previous prime is 525983. The next prime is 526027. The reversal of 525997 is 799525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 281961 + 244036 = 531^2 + 494^2 .

It is not a de Polignac number, because 525997 - 2⁷ = 525869 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525937) 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, 15454 + ... + 15487.

It is an arithmetic number, because the mean of its divisors is an integer number (139239).

2⁵²⁵⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

525997 is a deficient number, since it is larger than the sum of its proper divisors (30959).

525997 is a wasteful number, since it uses less digits than its factorization.

525997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30958.

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

The square root of 525997 is about 725.2565063479. The cubic root of 525997 is about 80.7224663067.

It can be divided in two parts, 5259 and 97, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 525997 in words is "five hundred twenty-five thousand, nine hundred ninety-seven".