2821871 has 8 divisors (see below), whose sum is σ = 3063984. Its totient is φ = 2583360.

The previous prime is 2821867. The next prime is 2821877. The reversal of 2821871 is 1781282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2821871 - 2² = 2821867 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 (2821877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875 + ... + 2531.

It is an arithmetic number, because the mean of its divisors is an integer number (382998).

2^2821871 is an apocalyptic number.

2821871 is a deficient number, since it is larger than the sum of its proper divisors (242113).

2821871 is a wasteful number, since it uses less digits than its factorization.

2821871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801.

The product of its digits is 1792, while the sum is 29.

The square root of 2821871 is about 1679.8425521459. The cubic root of 2821871 is about 141.3120029565.

The spelling of 2821871 in words is "two million, eight hundred twenty-one thousand, eight hundred seventy-one".