289825 has 6 divisors (see below), whose sum is σ = 359414. Its totient is φ = 231840.

The previous prime is 289789. The next prime is 289837. The reversal of 289825 is 528982.

It can be written as a sum of positive squares in 3 ways, for example, as 74529 + 215296 = 273^2 + 464^2 .

It is a de Polignac number, because none of the positive numbers 2^k-289825 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 5772 + ... + 5821.

2²⁸⁹⁸²⁵ is an apocalyptic number.

289825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

289825 is a deficient number, since it is larger than the sum of its proper divisors (69589).

289825 is a wasteful number, since it uses less digits than its factorization.

289825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11603 (or 11598 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 289825 is about 538.3539727726. The cubic root of 289825 is about 66.1777425076.

The spelling of 289825 in words is "two hundred eighty-nine thousand, eight hundred twenty-five".