2041561 has 2 divisors, whose sum is σ = 2041562. Its totient is φ = 2041560.

The previous prime is 2041553. The next prime is 2041579. The reversal of 2041561 is 1651402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1806336 + 235225 = 1344^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2041561 - 2³ = 2041553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2041661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020780 + 1020781.

It is an arithmetic number, because the mean of its divisors is an integer number (1020781).

2^2041561 is an apocalyptic number.

It is an amenable number.

2041561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2041561 is an equidigital number, since it uses as much as digits as its factorization.

2041561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2041561 is about 1428.8320405142. The cubic root of 2041561 is about 126.8588549105.

Adding to 2041561 its reverse (1651402), we get a palindrome (3692963).

The spelling of 2041561 in words is "two million, forty-one thousand, five hundred sixty-one".