620261 has 2 divisors, whose sum is σ = 620262. Its totient is φ = 620260.

The previous prime is 620251. The next prime is 620297. The reversal of 620261 is 162026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591361 + 28900 = 769^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 620261 - 2⁶ = 620197 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310130 + 310131.

It is an arithmetic number, because the mean of its divisors is an integer number (310131).

2⁶²⁰²⁶¹ is an apocalyptic number.

It is an amenable number.

620261 is a deficient number, since it is larger than the sum of its proper divisors (1).

620261 is an equidigital number, since it uses as much as digits as its factorization.

620261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 620261 is about 787.5665051283. The cubic root of 620261 is about 85.2821534873.

Adding to 620261 its reverse (162026), we get a palindrome (782287).

The spelling of 620261 in words is "six hundred twenty thousand, two hundred sixty-one".