2811145 has 16 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 2104704.

The previous prime is 2811131. The next prime is 2811161. The reversal of 2811145 is 5411182.

It is a 4-Lehmer number, since φ(2811145) divides (2811145-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 2811145 - 2⁵ = 2811113 is a prime.

It is a super-2 number, since 2×2811145² = 15805072422050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11949 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (224640).

2^2811145 is an apocalyptic number.

It is an amenable number.

2811145 is a deficient number, since it is larger than the sum of its proper divisors (783095).

2811145 is a wasteful number, since it uses less digits than its factorization.

2811145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384.

The product of its digits is 320, while the sum is 22.

The square root of 2811145 is about 1676.6469515077. The cubic root of 2811145 is about 141.1327321784.

The spelling of 2811145 in words is "two million, eight hundred eleven thousand, one hundred forty-five".