2689581 has 8 divisors (see below), whose sum is σ = 3639904. Its totient is φ = 1766160.

The previous prime is 2689573. The next prime is 2689601. The reversal of 2689581 is 1859862.

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

It is not a de Polignac number, because 2689581 - 2³ = 2689573 is a prime.

It is a super-2 number, since 2×2689581² = 14467691911122, which contains 22 as substring.

It is a Duffinian number.

2689581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2689501) 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, 6490 + ... + 6891.

It is an arithmetic number, because the mean of its divisors is an integer number (454988).

2^2689581 is an apocalyptic number.

It is an amenable number.

2689581 is a deficient number, since it is larger than the sum of its proper divisors (950323).

2689581 is a wasteful number, since it uses less digits than its factorization.

2689581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13451.

The product of its digits is 34560, while the sum is 39.

The square root of 2689581 is about 1639.9942073068. The cubic root of 2689581 is about 139.0683203641.

The spelling of 2689581 in words is "two million, six hundred eighty-nine thousand, five hundred eighty-one".