1820125 has 8 divisors (see below), whose sum is σ = 2271672. Its totient is φ = 1456000.

The previous prime is 1820123. The next prime is 1820129. The reversal of 1820125 is 5210281.

It can be written as a sum of positive squares in 4 ways, for example, as 324 + 1819801 = 18^2 + 1349^2 .

It is not a de Polignac number, because 1820125 - 2¹ = 1820123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7156 + ... + 7405.

It is an arithmetic number, because the mean of its divisors is an integer number (283959).

2^1820125 is an apocalyptic number.

It is an amenable number.

1820125 is a deficient number, since it is larger than the sum of its proper divisors (451547).

1820125 is an equidigital number, since it uses as much as digits as its factorization.

1820125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14576 (or 14566 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1820125 is about 1349.1200836101. The cubic root of 1820125 is about 122.0957100782.

The spelling of 1820125 in words is "one million, eight hundred twenty thousand, one hundred twenty-five".