1813045 has 8 divisors (see below), whose sum is σ = 2343096. Its totient is φ = 1338816.

The previous prime is 1813039. The next prime is 1813073. The reversal of 1813045 is 5403181.

It can be written as a sum of positive squares in 4 ways, for example, as 427716 + 1385329 = 654^2 + 1177^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1813045 - 2⁷ = 1812917 is a prime.

It is a Duffinian number.

It is a congruent 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, 13882 + ... + 14011.

It is an arithmetic number, because the mean of its divisors is an integer number (292887).

2^1813045 is an apocalyptic number.

It is an amenable number.

1813045 is a deficient number, since it is larger than the sum of its proper divisors (530051).

1813045 is a wasteful number, since it uses less digits than its factorization.

1813045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27911.

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

The square root of 1813045 is about 1346.4935944890. The cubic root of 1813045 is about 121.9371933283.

The spelling of 1813045 in words is "one million, eight hundred thirteen thousand, forty-five".