4010561 has 2 divisors, whose sum is σ = 4010562. Its totient is φ = 4010560.

The previous prime is 4010551. The next prime is 4010569. The reversal of 4010561 is 1650104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2119936 + 1890625 = 1456^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 4010561 - 2¹⁸ = 3748417 is a prime.

It is not a weakly prime, because it can be changed into another prime (4010569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2005280 + 2005281.

It is an arithmetic number, because the mean of its divisors is an integer number (2005281).

Almost surely, 2^4010561 is an apocalyptic number.

It is an amenable number.

4010561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4010561 is an equidigital number, since it uses as much as digits as its factorization.

4010561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 4010561 is about 2002.6385095668. The cubic root of 4010561 is about 158.8796869461.

Adding to 4010561 its reverse (1650104), we get a palindrome (5660665).

It can be divided in two parts, 40 and 10561, that added together give a palindrome (10601).

The spelling of 4010561 in words is "four million, ten thousand, five hundred sixty-one".