609825 has 24 divisors (see below), whose sum is σ = 1035648. Its totient is φ = 316480.

The previous prime is 609821. The next prime is 609859. The reversal of 609825 is 528906.

It is not a de Polignac number, because 609825 - 2² = 609821 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 609792 and 609801.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609825.

It is not an unprimeable number, because it can be changed into a prime (609821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3439 + ... + 3611.

It is an arithmetic number, because the mean of its divisors is an integer number (43152).

2⁶⁰⁹⁸²⁵ is an apocalyptic number.

It is an amenable number.

609825 is a deficient number, since it is larger than the sum of its proper divisors (425823).

609825 is a wasteful number, since it uses less digits than its factorization.

609825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 609825 is about 780.9129272845. The cubic root of 609825 is about 84.8011499340.

The spelling of 609825 in words is "six hundred nine thousand, eight hundred twenty-five".