1806013 has 4 divisors (see below), whose sum is σ = 1970208. Its totient is φ = 1641820.

The previous prime is 1806011. The next prime is 1806017. The reversal of 1806013 is 3106081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1806013 - 2¹ = 1806011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82081 + ... + 82102.

It is an arithmetic number, because the mean of its divisors is an integer number (492552).

2^1806013 is an apocalyptic number.

It is an amenable number.

1806013 is a deficient number, since it is larger than the sum of its proper divisors (164195).

1806013 is a wasteful number, since it uses less digits than its factorization.

1806013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164194.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1806013 is about 1343.8798309373. The cubic root of 1806013 is about 121.7793422526.

The spelling of 1806013 in words is "one million, eight hundred six thousand, thirteen".