1806625 has 16 divisors (see below), whose sum is σ = 2293200. Its totient is φ = 1420800.

The previous prime is 1806617. The next prime is 1806631. The reversal of 1806625 is 5266081.

It can be written as a sum of positive squares in 8 ways, for example, as 1018081 + 788544 = 1009^2 + 888^2 .

It is not a de Polignac number, because 1806625 - 2³ = 1806617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1806593 and 1806602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12051 + ... + 12199.

It is an arithmetic number, because the mean of its divisors is an integer number (143325).

2^1806625 is an apocalyptic number.

It is an amenable number.

1806625 is a deficient number, since it is larger than the sum of its proper divisors (486575).

1806625 is an equidigital number, since it uses as much as digits as its factorization.

1806625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1806625 is about 1344.1075105809. The cubic root of 1806625 is about 121.7930964062.

The spelling of 1806625 in words is "one million, eight hundred six thousand, six hundred twenty-five".