1782145 has 8 divisors (see below), whose sum is σ = 2160360. Its totient is φ = 1411200.

The previous prime is 1782139. The next prime is 1782167. The reversal of 1782145 is 5412871.

It can be written as a sum of positive squares in 4 ways, for example, as 242064 + 1540081 = 492^2 + 1241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1782145 - 2⁵ = 1782113 is a prime.

1782145 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1260 + ... + 2269.

It is an arithmetic number, because the mean of its divisors is an integer number (270045).

2^1782145 is an apocalyptic number.

It is an amenable number.

1782145 is a deficient number, since it is larger than the sum of its proper divisors (378215).

1782145 is a wasteful number, since it uses less digits than its factorization.

1782145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635.

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

The square root of 1782145 is about 1334.9700371169. The cubic root of 1782145 is about 121.2404888561.

The spelling of 1782145 in words is "one million, seven hundred eighty-two thousand, one hundred forty-five".