2871609 has 16 divisors (see below), whose sum is σ = 4267200. Its totient is φ = 1705536.

The previous prime is 2871587. The next prime is 2871611. The reversal of 2871609 is 9061782.

It is not a de Polignac number, because 2871609 - 2¹⁵ = 2838841 is a prime.

It is a super-2 number, since 2×2871609² = 16492276497762, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2871609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2871629) 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, 139 + ... + 2400.

It is an arithmetic number, because the mean of its divisors is an integer number (266700).

2^2871609 is an apocalyptic number.

2871609 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2871609 is a deficient number, since it is larger than the sum of its proper divisors (1395591).

2871609 is a wasteful number, since it uses less digits than its factorization.

2871609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2871609 is about 1694.5822494054. The cubic root of 2871609 is about 142.1374223441.

The spelling of 2871609 in words is "two million, eight hundred seventy-one thousand, six hundred nine".