805525 has 12 divisors (see below), whose sum is σ = 1141792. Its totient is φ = 552240.

The previous prime is 805523. The next prime is 805531. The reversal of 805525 is 525508.

It is not a de Polignac number, because 805525 - 2¹ = 805523 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

805525 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 805525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2127 + ... + 2476.

2⁸⁰⁵⁵²⁵ is an apocalyptic number.

It is an amenable number.

805525 is a deficient number, since it is larger than the sum of its proper divisors (336267).

805525 is a wasteful number, since it uses less digits than its factorization.

805525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620 (or 4615 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 805525 is about 897.5104456217. The cubic root of 805525 is about 93.0449930669.

The spelling of 805525 in words is "eight hundred five thousand, five hundred twenty-five".