2887581 has 8 divisors (see below), whose sum is σ = 4017600. Its totient is φ = 1841312.

The previous prime is 2887567. The next prime is 2887583. The reversal of 2887581 is 1857882.

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

It is a cyclic number.

It is not a de Polignac number, because 2887581 - 2¹⁰ = 2886557 is a prime.

It is a super-2 number, since 2×2887581² = 16676248063122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2887583) 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, 20856 + ... + 20993.

It is an arithmetic number, because the mean of its divisors is an integer number (502200).

2^2887581 is an apocalyptic number.

It is an amenable number.

2887581 is a deficient number, since it is larger than the sum of its proper divisors (1130019).

2887581 is a wasteful number, since it uses less digits than its factorization.

2887581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41875.

The product of its digits is 35840, while the sum is 39.

The square root of 2887581 is about 1699.2883804699. The cubic root of 2887581 is about 142.4004598784.

The spelling of 2887581 in words is "two million, eight hundred eighty-seven thousand, five hundred eighty-one".