2131105 has 8 divisors (see below), whose sum is σ = 2586600. Its totient is φ = 1685376.

The previous prime is 2131099. The next prime is 2131109. The reversal of 2131105 is 5011312.

It can be written as a sum of positive squares in 4 ways, for example, as 22801 + 2108304 = 151^2 + 1452^2 .

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 2131105 - 2¹⁵ = 2098337 is a prime.

2131105 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2131109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1950 + ... + 2839.

It is an arithmetic number, because the mean of its divisors is an integer number (323325).

2^2131105 is an apocalyptic number.

It is an amenable number.

2131105 is a deficient number, since it is larger than the sum of its proper divisors (455495).

2131105 is an equidigital number, since it uses as much as digits as its factorization.

2131105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4883.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 2131105 is about 1459.8304696094. The cubic root of 2131105 is about 128.6870808288.

Adding to 2131105 its reverse (5011312), we get a palindrome (7142417).

The spelling of 2131105 in words is "two million, one hundred thirty-one thousand, one hundred five".