1812625 has 16 divisors (see below), whose sum is σ = 2398032. Its totient is φ = 1363200.

The previous prime is 1812623. The next prime is 1812661. The reversal of 1812625 is 5262181.

It can be written as a sum of positive squares in 8 ways, for example, as 804609 + 1008016 = 897^2 + 1004^2 .

It is not a de Polignac number, because 1812625 - 2¹ = 1812623 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1812625.

It is not an unprimeable number, because it can be changed into a prime (1812623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1699 + ... + 2551.

It is an arithmetic number, because the mean of its divisors is an integer number (149877).

2^1812625 is an apocalyptic number.

It is an amenable number.

1812625 is a deficient number, since it is larger than the sum of its proper divisors (585407).

1812625 is an equidigital number, since it uses as much as digits as its factorization.

1812625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 875 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 1812625 is about 1346.3376248178. The cubic root of 1812625 is about 121.9277768354.

The spelling of 1812625 in words is "one million, eight hundred twelve thousand, six hundred twenty-five".