2581873 has 8 divisors (see below), whose sum is σ = 2965248. Its totient is φ = 2202144.

The previous prime is 2581861. The next prime is 2581877. The reversal of 2581873 is 3781852.

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

It is a de Polignac number, because none of the positive numbers 2^k-2581873 is a prime.

It is a Duffinian number.

2581873 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2581877) 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, 840 + ... + 2422.

It is an arithmetic number, because the mean of its divisors is an integer number (370656).

2^2581873 is an apocalyptic number.

It is an amenable number.

2581873 is a deficient number, since it is larger than the sum of its proper divisors (383375).

2581873 is a wasteful number, since it uses less digits than its factorization.

2581873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823.

The product of its digits is 13440, while the sum is 34.

The square root of 2581873 is about 1606.8207740753. The cubic root of 2581873 is about 137.1865786836.

The spelling of 2581873 in words is "two million, five hundred eighty-one thousand, eight hundred seventy-three".