2871681 has 16 divisors (see below), whose sum is σ = 4034688. Its totient is φ = 1814400.

The previous prime is 2871643. The next prime is 2871689. The reversal of 2871681 is 1861782.

It is a happy number.

It is not a de Polignac number, because 2871681 - 2¹⁰ = 2870657 is a prime.

It is a super-2 number, since 2×2871681² = 16493103531522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2871689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4236 + ... + 4866.

It is an arithmetic number, because the mean of its divisors is an integer number (252168).

2^2871681 is an apocalyptic number.

It is an amenable number.

2871681 is a deficient number, since it is larger than the sum of its proper divisors (1163007).

2871681 is a wasteful number, since it uses less digits than its factorization.

2871681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712.

The product of its digits is 5376, while the sum is 33.

The square root of 2871681 is about 1694.6034934462. The cubic root of 2871681 is about 142.1386102738.

The spelling of 2871681 in words is "two million, eight hundred seventy-one thousand, six hundred eighty-one".