2111849 has 4 divisors (see below), whose sum is σ = 2168964. Its totient is φ = 2054736.

The previous prime is 2111843. The next prime is 2111861. The reversal of 2111849 is 9481112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1243225 + 868624 = 1115^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111849 - 2¹⁶ = 2046313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2111843) 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, 28502 + ... + 28575.

It is an arithmetic number, because the mean of its divisors is an integer number (542241).

2^2111849 is an apocalyptic number.

It is an amenable number.

2111849 is a deficient number, since it is larger than the sum of its proper divisors (57115).

2111849 is an equidigital number, since it uses as much as digits as its factorization.

2111849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57114.

The product of its digits is 576, while the sum is 26.

The square root of 2111849 is about 1453.2202173105. The cubic root of 2111849 is about 128.2983154396.

The spelling of 2111849 in words is "two million, one hundred eleven thousand, eight hundred forty-nine".