2561329 has 8 divisors (see below), whose sum is σ = 2628800. Its totient is φ = 2494800.

The previous prime is 2561327. The next prime is 2561341. The reversal of 2561329 is 9231652.

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 2561329 - 2¹ = 2561327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2561297 and 2561306.

It is not an unprimeable number, because it can be changed into a prime (2561323) 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, 12034 + ... + 12244.

It is an arithmetic number, because the mean of its divisors is an integer number (328600).

2^2561329 is an apocalyptic number.

It is an amenable number.

2561329 is a deficient number, since it is larger than the sum of its proper divisors (67471).

2561329 is a wasteful number, since it uses less digits than its factorization.

2561329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471.

The product of its digits is 3240, while the sum is 28.

The square root of 2561329 is about 1600.4152586126. The cubic root of 2561329 is about 136.8217441184.

The spelling of 2561329 in words is "two million, five hundred sixty-one thousand, three hundred twenty-nine".