3301561 has 2 divisors, whose sum is σ = 3301562. Its totient is φ = 3301560.

The previous prime is 3301541. The next prime is 3301579. The reversal of 3301561 is 1651033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3171961 + 129600 = 1781^2 + 360^2 .

It is an emirp because it is prime and its reverse (1651033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3301561 - 2²¹ = 1204409 is a prime.

It is not a weakly prime, because it can be changed into another prime (3301511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1650780 + 1650781.

It is an arithmetic number, because the mean of its divisors is an integer number (1650781).

Almost surely, 2^3301561 is an apocalyptic number.

It is an amenable number.

3301561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3301561 is an equidigital number, since it uses as much as digits as its factorization.

3301561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 3301561 is about 1817.0198127704. The cubic root of 3301561 is about 148.9040265996.

Adding to 3301561 its reverse (1651033), we get a palindrome (4952594).

It can be divided in two parts, 330 and 1561, that added together give a triangular number (1891 = T₆₁).

The spelling of 3301561 in words is "three million, three hundred one thousand, five hundred sixty-one".