1803125 has 12 divisors (see below), whose sum is σ = 2257668. Its totient is φ = 1440000.

The previous prime is 1803103. The next prime is 1803127. The reversal of 1803125 is 5213081.

It can be written as a sum of positive squares in 6 ways, for example, as 908209 + 894916 = 953^2 + 946^2 .

It is not a de Polignac number, because 1803125 - 2²⁰ = 754549 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1803097 and 1803106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803127) 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, 2837 + ... + 3413.

It is an arithmetic number, because the mean of its divisors is an integer number (188139).

2^1803125 is an apocalyptic number.

It is an amenable number.

1803125 is a deficient number, since it is larger than the sum of its proper divisors (454543).

1803125 is an frugal number, since it uses more digits than its factorization.

1803125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1803125 is about 1342.8049001996. The cubic root of 1803125 is about 121.7143950688.

It can be divided in two parts, 18031 and 25, that multiplied together give a triangular number (450775 = T₉₄₉).

The spelling of 1803125 in words is "one million, eight hundred three thousand, one hundred twenty-five".