1830145 has 4 divisors (see below), whose sum is σ = 2196180. Its totient is φ = 1464112.

The previous prime is 1830119. The next prime is 1830163. The reversal of 1830145 is 5410381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1459264 + 370881 = 1208^2 + 609^2 .

It is a cyclic number.

It is not a de Polignac number, because 1830145 - 2⁵ = 1830113 is a prime.

It is an alternating number because its digits alternate between odd and even.

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, 183010 + ... + 183019.

It is an arithmetic number, because the mean of its divisors is an integer number (549045).

2^1830145 is an apocalyptic number.

It is an amenable number.

1830145 is a deficient number, since it is larger than the sum of its proper divisors (366035).

1830145 is an equidigital number, since it uses as much as digits as its factorization.

1830145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366034.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1830145 is about 1352.8285183274. The cubic root of 1830145 is about 122.3193505555.

The spelling of 1830145 in words is "one million, eight hundred thirty thousand, one hundred forty-five".