2105671 has 4 divisors (see below), whose sum is σ = 2229552. Its totient is φ = 1981792.

The previous prime is 2105669. The next prime is 2105681. The reversal of 2105671 is 1765012.

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

It is not a de Polignac number, because 2105671 - 2¹ = 2105669 is a prime.

It is a Duffinian number.

2105671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61915 + ... + 61948.

It is an arithmetic number, because the mean of its divisors is an integer number (557388).

2^2105671 is an apocalyptic number.

2105671 is a deficient number, since it is larger than the sum of its proper divisors (123881).

2105671 is a wasteful number, since it uses less digits than its factorization.

2105671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123880.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 2105671 is about 1451.0930363006. The cubic root of 2105671 is about 128.1730853421.

The spelling of 2105671 in words is "two million, one hundred five thousand, six hundred seventy-one".