2705561 has 2 divisors, whose sum is σ = 2705562. Its totient is φ = 2705560.

The previous prime is 2705539. The next prime is 2705569. The reversal of 2705561 is 1655072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2157961 + 547600 = 1469^2 + 740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2705561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2705561.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2705569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1352780 + 1352781.

It is an arithmetic number, because the mean of its divisors is an integer number (1352781).

2^2705561 is an apocalyptic number.

It is an amenable number.

2705561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2705561 is an equidigital number, since it uses as much as digits as its factorization.

2705561 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2705561 is about 1644.8589605191. The cubic root of 2705561 is about 139.3431989891.

The spelling of 2705561 in words is "two million, seven hundred five thousand, five hundred sixty-one".