4020260261 has 2 divisors, whose sum is σ = 4020260262. Its totient is φ = 4020260260.

The previous prime is 4020260243. The next prime is 4020260329. The reversal of 4020260261 is 1620620204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3634884100 + 385376161 = 60290^2 + 19631^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020260261 - 2³⁰ = 2946518437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4020260201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010130130 + 2010130131.

It is an arithmetic number, because the mean of its divisors is an integer number (2010130131).

Almost surely, 2^4020260261 is an apocalyptic number.

It is an amenable number.

4020260261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020260261 is an equidigital number, since it uses as much as digits as its factorization.

4020260261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 4020260261 is about 63405.5223225864. The cubic root of 4020260261 is about 1590.0766363388.

Adding to 4020260261 its reverse (1620620204), we get a palindrome (5640880465).

The spelling of 4020260261 in words is "four billion, twenty million, two hundred sixty thousand, two hundred sixty-one".