810525 has 24 divisors (see below), whose sum is σ = 1365984. Its totient is φ = 424000.

The previous prime is 810517. The next prime is 810533. The reversal of 810525 is 525018.

810525 = 102² + 103² + ... + 151².

It is an interprime number because it is at equal distance from previous prime (810517) and next prime (810533).

It is not a de Polignac number, because 810525 - 2³ = 810517 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 23 ways as a sum of consecutive naturals, for example, 7522 + ... + 7628.

It is an arithmetic number, because the mean of its divisors is an integer number (56916).

2⁸¹⁰⁵²⁵ is an apocalyptic number.

It is an amenable number.

810525 is a deficient number, since it is larger than the sum of its proper divisors (555459).

810525 is a wasteful number, since it uses less digits than its factorization.

810525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 810525 is about 900.2916194212. The cubic root of 810525 is about 93.2371102990.

The spelling of 810525 in words is "eight hundred ten thousand, five hundred twenty-five".