2020261 has 2 divisors, whose sum is σ = 2020262. Its totient is φ = 2020260.

The previous prime is 2020253. The next prime is 2020279. The reversal of 2020261 is 1620202.

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., 1221025 + 799236 = 1105^2 + 894^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020261 - 2³ = 2020253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020231) 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, 1010130 + 1010131.

It is an arithmetic number, because the mean of its divisors is an integer number (1010131).

2^2020261 is an apocalyptic number.

It is an amenable number.

2020261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020261 is an equidigital number, since it uses as much as digits as its factorization.

2020261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2020261 is about 1421.3588568690. The cubic root of 2020261 is about 126.4161306725.

Adding to 2020261 its reverse (1620202), we get a palindrome (3640463).

The spelling of 2020261 in words is "two million, twenty thousand, two hundred sixty-one".