525565 has 8 divisors (see below), whose sum is σ = 634680. Its totient is φ = 417792.

The previous prime is 525541. The next prime is 525571. The reversal of 525565 is 565525.

It can be written as a sum of positive squares in 4 ways, for example, as 320356 + 205209 = 566^2 + 453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 525565 - 2⁵ = 525533 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081 + ... + 1489.

It is an arithmetic number, because the mean of its divisors is an integer number (79335).

2⁵²⁵⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

525565 is a deficient number, since it is larger than the sum of its proper divisors (109115).

525565 is a wasteful number, since it uses less digits than its factorization.

525565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its digits is 7500, while the sum is 28.

The square root of 525565 is about 724.9586195087. The cubic root of 525565 is about 80.7003612018.

The spelling of 525565 in words is "five hundred twenty-five thousand, five hundred sixty-five".