825570 has 24 divisors (see below), whose sum is σ = 2146716. Its totient is φ = 220128.

The previous prime is 825553. The next prime is 825577. The reversal of 825570 is 75528.

825570 = T₃₆ + T₃₇ + ... + T₁₇₀.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 710649 + 114921 = 843^2 + 339^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (825577) 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, 4497 + ... + 4676.

2⁸²⁵⁵⁷⁰ is an apocalyptic number.

825570 is an abundant number, since it is smaller than the sum of its proper divisors (1321146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825570 is a wasteful number, since it uses less digits than its factorization.

825570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9186 (or 9183 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 825570 is about 908.6088267236. The cubic root of 825570 is about 93.8104676573.

The spelling of 825570 in words is "eight hundred twenty-five thousand, five hundred seventy".