2149871 has 12 divisors (see below), whose sum is σ = 2350392. Its totient is φ = 1964928.

The previous prime is 2149867. The next prime is 2149877. The reversal of 2149871 is 1789412.

It is not a de Polignac number, because 2149871 - 2² = 2149867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12341 + ... + 12513.

It is an arithmetic number, because the mean of its divisors is an integer number (195866).

2^2149871 is an apocalyptic number.

2149871 is a deficient number, since it is larger than the sum of its proper divisors (200521).

2149871 is a wasteful number, since it uses less digits than its factorization.

2149871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 233 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 2149871 is about 1466.2438405668. The cubic root of 2149871 is about 129.0637066900.

The spelling of 2149871 in words is "two million, one hundred forty-nine thousand, eight hundred seventy-one".