2871321 has 4 divisors (see below), whose sum is σ = 3828432. Its totient is φ = 1914212.

The previous prime is 2871293. The next prime is 2871347. The reversal of 2871321 is 1231782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2871321 - 2⁵ = 2871289 is a prime.

It is a D-number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2871291 and 2871300.

It is not an unprimeable number, because it can be changed into a prime (2871361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478551 + ... + 478556.

It is an arithmetic number, because the mean of its divisors is an integer number (957108).

2^2871321 is an apocalyptic number.

It is an amenable number.

2871321 is a deficient number, since it is larger than the sum of its proper divisors (957111).

2871321 is an equidigital number, since it uses as much as digits as its factorization.

2871321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957110.

The product of its digits is 672, while the sum is 24.

The square root of 2871321 is about 1694.4972705791. The cubic root of 2871321 is about 142.1326704267.

The spelling of 2871321 in words is "two million, eight hundred seventy-one thousand, three hundred twenty-one".