2011305 has 8 divisors (see below), whose sum is σ = 3218112. Its totient is φ = 1072688.

The previous prime is 2011291. The next prime is 2011309. The reversal of 2011305 is 5031102.

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 2011305 - 2⁶ = 2011241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2011309) 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 7 ways as a sum of consecutive naturals, for example, 67029 + ... + 67058.

It is an arithmetic number, because the mean of its divisors is an integer number (402264).

2^2011305 is an apocalyptic number.

It is an amenable number.

2011305 is a deficient number, since it is larger than the sum of its proper divisors (1206807).

2011305 is a wasteful number, since it uses less digits than its factorization.

2011305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134095.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 2011305 is about 1418.2048512116. The cubic root of 2011305 is about 126.2290492307.

Adding to 2011305 its reverse (5031102), we get a palindrome (7042407).

It can be divided in two parts, 20 and 11305, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 2011305 in words is "two million, eleven thousand, three hundred five".