1845172 has 12 divisors (see below), whose sum is σ = 3690400. Its totient is φ = 790776.

The previous prime is 1845167. The next prime is 1845187. The reversal of 1845172 is 2715481.

1845172 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 65899 = 1845172 / (1 + 8 + 4 + 5 + 1 + 7 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 1845172.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32922 + ... + 32977.

2^1845172 is an apocalyptic number.

It is an amenable number.

1845172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1845172 is a wasteful number, since it uses less digits than its factorization.

1845172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65910 (or 65908 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 1845172 is about 1358.3710833200. The cubic root of 1845172 is about 122.6532193566.

It can be divided in two parts, 184 and 5172, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 1845172 in words is "one million, eight hundred forty-five thousand, one hundred seventy-two".