2581329 has 8 divisors (see below), whose sum is σ = 3449952. Its totient is φ = 1716800.

The previous prime is 2581289. The next prime is 2581349. The reversal of 2581329 is 9231852.

It is a happy number.

2581329 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 a de Polignac number, because none of the positive numbers 2^k-2581329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2581296 and 2581305.

It is not an unprimeable number, because it can be changed into a prime (2581349) 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, 1054 + ... + 2504.

It is an arithmetic number, because the mean of its divisors is an integer number (431244).

2^2581329 is an apocalyptic number.

It is an amenable number.

2581329 is a deficient number, since it is larger than the sum of its proper divisors (868623).

2581329 is a wasteful number, since it uses less digits than its factorization.

2581329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047.

The product of its digits is 4320, while the sum is 30.

The square root of 2581329 is about 1606.6514867886. The cubic root of 2581329 is about 137.1769429474.

The spelling of 2581329 in words is "two million, five hundred eighty-one thousand, three hundred twenty-nine".