1819045 has 4 divisors (see below), whose sum is σ = 2182860. Its totient is φ = 1455232.

The previous prime is 1819043. The next prime is 1819057. The reversal of 1819045 is 5409181.

It is a happy number.

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 185761 + 1633284 = 431^2 + 1278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1819045 - 2¹ = 1819043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819043) by changing a digit.

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, 181900 + ... + 181909.

It is an arithmetic number, because the mean of its divisors is an integer number (545715).

2^1819045 is an apocalyptic number.

It is an amenable number.

1819045 is a deficient number, since it is larger than the sum of its proper divisors (363815).

1819045 is an equidigital number, since it uses as much as digits as its factorization.

1819045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363814.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1819045 is about 1348.7197633311. The cubic root of 1819045 is about 122.0715561590.

It can be divided in two parts, 181 and 9045, that multiplied together give a triangular number (1637145 = T₁₈₀₉).

The spelling of 1819045 in words is "one million, eight hundred nineteen thousand, forty-five".