2561043 has 8 divisors (see below), whose sum is σ = 3426768. Its totient is φ = 1701344.

The previous prime is 2561023. The next prime is 2561051. The reversal of 2561043 is 3401652.

It is a happy number.

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 2561043 - 2⁶ = 2560979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2561023) 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, 396 + ... + 2297.

It is an arithmetic number, because the mean of its divisors is an integer number (428346).

2^2561043 is an apocalyptic number.

2561043 is a deficient number, since it is larger than the sum of its proper divisors (865725).

2561043 is a wasteful number, since it uses less digits than its factorization.

2561043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2561043 is about 1600.3259043082. The cubic root of 2561043 is about 136.8166513878.

Adding to 2561043 its reverse (3401652), we get a palindrome (5962695).

The spelling of 2561043 in words is "two million, five hundred sixty-one thousand, forty-three".