1808125 has 20 divisors (see below), whose sum is σ = 2474208. Its totient is φ = 1310000.

The previous prime is 1808119. The next prime is 1808161. The reversal of 1808125 is 5218081.

It is not a de Polignac number, because 1808125 - 2³ = 1808117 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1808125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6744 + ... + 7006.

2^1808125 is an apocalyptic number.

It is an amenable number.

1808125 is a deficient number, since it is larger than the sum of its proper divisors (666083).

1808125 is an equidigital number, since it uses as much as digits as its factorization.

1808125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1808125 is about 1344.6653858860. The cubic root of 1808125 is about 121.8267944355.

The spelling of 1808125 in words is "one million, eight hundred eight thousand, one hundred twenty-five".