2581015 has 8 divisors (see below), whose sum is σ = 3107520. Its totient is φ = 2057952.

The previous prime is 2581013. The next prime is 2581027. The reversal of 2581015 is 5101852.

2581015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2581015 - 2¹ = 2581013 is a prime.

2581015 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282 + ... + 2608.

It is an arithmetic number, because the mean of its divisors is an integer number (388440).

2^2581015 is an apocalyptic number.

2581015 is a deficient number, since it is larger than the sum of its proper divisors (526505).

2581015 is a wasteful number, since it uses less digits than its factorization.

2581015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 2581015 is about 1606.5537650511. The cubic root of 2581015 is about 137.1713805276.

Adding to 2581015 its reverse (5101852), we get a palindrome (7682867).

The spelling of 2581015 in words is "two million, five hundred eighty-one thousand, fifteen".