1801125 has 24 divisors (see below), whose sum is σ = 3248856. Its totient is φ = 960000.

The previous prime is 1801117. The next prime is 1801187. The reversal of 1801125 is 5211081.

It can be written as a sum of positive squares in 4 ways, for example, as 42849 + 1758276 = 207^2 + 1326^2 .

It is not a de Polignac number, because 1801125 - 2³ = 1801117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1801098 and 1801107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 325 + ... + 1925.

It is an arithmetic number, because the mean of its divisors is an integer number (135369).

2^1801125 is an apocalyptic number.

1801125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1801125 is a deficient number, since it is larger than the sum of its proper divisors (1447731).

1801125 is a wasteful number, since it uses less digits than its factorization.

1801125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1801125 is about 1342.0599837563. The cubic root of 1801125 is about 121.6693771419.

It can be divided in two parts, 180 and 1125, that multiplied together give a square (202500 = 450²).

The spelling of 1801125 in words is "one million, eight hundred one thousand, one hundred twenty-five".