2105571 has 12 divisors (see below), whose sum is σ = 3040728. Its totient is φ = 1295424.

The previous prime is 2105567. The next prime is 2105591. The reversal of 2105571 is 1755012.

It is not a de Polignac number, because 2105571 - 2² = 2105567 is a prime.

2105571 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2105591) 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 11 ways as a sum of consecutive naturals, for example, 1570 + ... + 2583.

It is an arithmetic number, because the mean of its divisors is an integer number (253394).

2^2105571 is an apocalyptic number.

2105571 is a deficient number, since it is larger than the sum of its proper divisors (935157).

2105571 is a wasteful number, since it uses less digits than its factorization.

2105571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182 (or 4169 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 2105571 is about 1451.0585791070. The cubic root of 2105571 is about 128.1710562959.

The spelling of 2105571 in words is "two million, one hundred five thousand, five hundred seventy-one".