1825989 has 8 divisors (see below), whose sum is σ = 2656032. Its totient is φ = 1106640.

The previous prime is 1825969. The next prime is 1826003. The reversal of 1825989 is 9895281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1825989 - 2⁷ = 1825861 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1825989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1825969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27634 + ... + 27699.

It is an arithmetic number, because the mean of its divisors is an integer number (332004).

2^1825989 is an apocalyptic number.

It is an amenable number.

1825989 is a deficient number, since it is larger than the sum of its proper divisors (830043).

1825989 is a wasteful number, since it uses less digits than its factorization.

1825989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55347.

The product of its digits is 51840, while the sum is 42.

The square root of 1825989 is about 1351.2916043549. The cubic root of 1825989 is about 122.2266904090.

The spelling of 1825989 in words is "one million, eight hundred twenty-five thousand, nine hundred eighty-nine".