2147871 has 24 divisors (see below), whose sum is σ = 3232432. Its totient is φ = 1267200.

The previous prime is 2147869. The next prime is 2147881. The reversal of 2147871 is 1787412.

It is not a de Polignac number, because 2147871 - 2¹ = 2147869 is a prime.

It is a super-2 number, since 2×2147871² = 9226699665282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22095 + ... + 22191.

2^2147871 is an apocalyptic number.

2147871 is a deficient number, since it is larger than the sum of its proper divisors (1084561).

2147871 is a wasteful number, since it uses less digits than its factorization.

2147871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 172 counting only the distinct ones).

The product of its digits is 3136, while the sum is 30.

The square root of 2147871 is about 1465.5616670751. The cubic root of 2147871 is about 129.0236721175.

The spelling of 2147871 in words is "two million, one hundred forty-seven thousand, eight hundred seventy-one".