2764561 has 2 divisors, whose sum is σ = 2764562. Its totient is φ = 2764560.

The previous prime is 2764543. The next prime is 2764579. The reversal of 2764561 is 1654672.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2764543) and next prime (2764579).

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 1123600 = 1281^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 2764561 - 2⁹ = 2764049 is a prime.

It is not a weakly prime, because it can be changed into another prime (2764361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382280 + 1382281.

It is an arithmetic number, because the mean of its divisors is an integer number (1382281).

2^2764561 is an apocalyptic number.

It is an amenable number.

2764561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2764561 is an equidigital number, since it uses as much as digits as its factorization.

2764561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 2764561 is about 1662.6969056325. The cubic root of 2764561 is about 140.3488071033.

The spelling of 2764561 in words is "two million, seven hundred sixty-four thousand, five hundred sixty-one".