2759561 has 4 divisors (see below), whose sum is σ = 3153792. Its totient is φ = 2365332.

The previous prime is 2759539. The next prime is 2759599. The reversal of 2759561 is 1659572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2759561 - 2¹⁰ = 2758537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2759521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197105 + ... + 197118.

It is an arithmetic number, because the mean of its divisors is an integer number (788448).

2^2759561 is an apocalyptic number.

It is an amenable number.

2759561 is a deficient number, since it is larger than the sum of its proper divisors (394231).

2759561 is an equidigital number, since it uses as much as digits as its factorization.

2759561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394230.

The product of its digits is 18900, while the sum is 35.

The square root of 2759561 is about 1661.1926438556. The cubic root of 2759561 is about 140.2641441713.

The spelling of 2759561 in words is "two million, seven hundred fifty-nine thousand, five hundred sixty-one".