2561045 has 8 divisors (see below), whose sum is σ = 3102624. Its totient is φ = 2029264.

The previous prime is 2561023. The next prime is 2561051. The reversal of 2561045 is 5401652.

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 2561045 - 2¹⁰ = 2560021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2561045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1859 + ... + 2928.

It is an arithmetic number, because the mean of its divisors is an integer number (387828).

2^2561045 is an apocalyptic number.

It is an amenable number.

2561045 is a deficient number, since it is larger than the sum of its proper divisors (541579).

2561045 is a wasteful number, since it uses less digits than its factorization.

2561045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2561045 is about 1600.3265291808. The cubic root of 2561045 is about 136.8166870026.

Adding to 2561045 its reverse (5401652), we get a palindrome (7962697).

The spelling of 2561045 in words is "two million, five hundred sixty-one thousand, forty-five".