2171106 has 24 divisors (see below), whose sum is σ = 5376384. Its totient is φ = 620280.

The previous prime is 2171101. The next prime is 2171107. The reversal of 2171106 is 6011712.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2171101) 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, 8490 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (224016).

2^2171106 is an apocalyptic number.

2171106 is an abundant number, since it is smaller than the sum of its proper divisors (3205278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171106 is a wasteful number, since it uses less digits than its factorization.

2171106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17246 (or 17243 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 2171106 is about 1473.4673393055. The cubic root of 2171106 is about 129.4872504753.

Adding to 2171106 its reverse (6011712), we get a palindrome (8182818).

Subtracting 2171106 from its reverse (6011712), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 2171106 in words is "two million, one hundred seventy-one thousand, one hundred six".