2111671 has 4 divisors (see below), whose sum is σ = 2140672. Its totient is φ = 2082672.

The previous prime is 2111633. The next prime is 2111677. The reversal of 2111671 is 1761112.

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

It is a cyclic number.

It is not a de Polignac number, because 2111671 - 2⁹ = 2111159 is a prime.

It is a Duffinian number.

2111671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111677) 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, 14391 + ... + 14536.

It is an arithmetic number, because the mean of its divisors is an integer number (535168).

2^2111671 is an apocalyptic number.

2111671 is a deficient number, since it is larger than the sum of its proper divisors (29001).

2111671 is an equidigital number, since it uses as much as digits as its factorization.

2111671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29000.

The product of its digits is 84, while the sum is 19.

The square root of 2111671 is about 1453.1589727212. The cubic root of 2111671 is about 128.2947107403.

Adding to 2111671 its reverse (1761112), we get a palindrome (3872783).

The spelling of 2111671 in words is "two million, one hundred eleven thousand, six hundred seventy-one".