525545 has 8 divisors (see below), whose sum is σ = 638280. Its totient is φ = 415360.

The previous prime is 525541. The next prime is 525571. The reversal of 525545 is 545525.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 444889 = 284^2 + 667^2 .

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

It is not a de Polignac number, because 525545 - 2² = 525541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (525541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 1035.

It is an arithmetic number, because the mean of its divisors is an integer number (79785).

2⁵²⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

525545 is a deficient number, since it is larger than the sum of its proper divisors (112735).

525545 is a wasteful number, since it uses less digits than its factorization.

525545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275.

The product of its digits is 5000, while the sum is 26.

The square root of 525545 is about 724.9448254867. The cubic root of 525545 is about 80.6993375239.

The spelling of 525545 in words is "five hundred twenty-five thousand, five hundred forty-five".