1812265 has 24 divisors (see below), whose sum is σ = 2729160. Its totient is φ = 1145088.

The previous prime is 1812263. The next prime is 1812269. The reversal of 1812265 is 5622181.

It can be written as a sum of positive squares in 4 ways, for example, as 5929 + 1806336 = 77^2 + 1344^2 .

It is not a de Polignac number, because 1812265 - 2¹ = 1812263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1812263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2901 + ... + 3469.

It is an arithmetic number, because the mean of its divisors is an integer number (113715).

2^1812265 is an apocalyptic number.

It is an amenable number.

1812265 is a deficient number, since it is larger than the sum of its proper divisors (916895).

1812265 is a wasteful number, since it uses less digits than its factorization.

1812265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 594 counting only the distinct ones).

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

The square root of 1812265 is about 1346.2039221455. The cubic root of 1812265 is about 121.9197043979.

It can be divided in two parts, 181 and 2265, that multiplied together give a triangular number (409965 = T₉₀₅).

The spelling of 1812265 in words is "one million, eight hundred twelve thousand, two hundred sixty-five".