2581115 has 4 divisors (see below), whose sum is σ = 3097344. Its totient is φ = 2064888.

The previous prime is 2581097. The next prime is 2581121. The reversal of 2581115 is 5111852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2581115 - 2⁸ = 2580859 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258107 + ... + 258116.

It is an arithmetic number, because the mean of its divisors is an integer number (774336).

2^2581115 is an apocalyptic number.

2581115 is a deficient number, since it is larger than the sum of its proper divisors (516229).

2581115 is an equidigital number, since it uses as much as digits as its factorization.

2581115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516228.

The product of its digits is 400, while the sum is 23.

The square root of 2581115 is about 1606.5848872686. The cubic root of 2581115 is about 137.1731520478.

Adding to 2581115 its reverse (5111852), we get a palindrome (7692967).

The spelling of 2581115 in words is "two million, five hundred eighty-one thousand, one hundred fifteen".