3280561 has 2 divisors, whose sum is σ = 3280562. Its totient is φ = 3280560.

The previous prime is 3280549. The next prime is 3280579. The reversal of 3280561 is 1650823.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 1577536 = 1305^2 + 1256^2 .

It is an emirp because it is prime and its reverse (1650823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3280561 - 2¹³ = 3272369 is a prime.

It is not a weakly prime, because it can be changed into another prime (3280591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640280 + 1640281.

It is an arithmetic number, because the mean of its divisors is an integer number (1640281).

Almost surely, 2^3280561 is an apocalyptic number.

It is an amenable number.

3280561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3280561 is an equidigital number, since it uses as much as digits as its factorization.

3280561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3280561 is about 1811.2319012208. The cubic root of 3280561 is about 148.5876471711.

The spelling of 3280561 in words is "three million, two hundred eighty thousand, five hundred sixty-one".