2750561 has 4 divisors (see below), whose sum is σ = 3000624. Its totient is φ = 2500500.

The previous prime is 2750557. The next prime is 2750569. The reversal of 2750561 is 1650572.

2750561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2750561 - 2² = 2750557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2750561.

It is not an unprimeable number, because it can be changed into a prime (2750569) 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 3 ways as a sum of consecutive naturals, for example, 125015 + ... + 125036.

It is an arithmetic number, because the mean of its divisors is an integer number (750156).

2^2750561 is an apocalyptic number.

It is an amenable number.

2750561 is a deficient number, since it is larger than the sum of its proper divisors (250063).

2750561 is a wasteful number, since it uses less digits than its factorization.

2750561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250062.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2750561 is about 1658.4815344163. The cubic root of 2750561 is about 140.1114928187. Note that the first 3 decimals are identical.

The spelling of 2750561 in words is "two million, seven hundred fifty thousand, five hundred sixty-one".