626261 has 2 divisors, whose sum is σ = 626262. Its totient is φ = 626260.

The previous prime is 626251. The next prime is 626317. The reversal of 626261 is 162626.

626261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323761 + 302500 = 569^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 626261 - 2¹⁰ = 625237 is a prime.

It is a Sophie Germain prime.

It is a magnanimous number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313130 + 313131.

It is an arithmetic number, because the mean of its divisors is an integer number (313131).

2⁶²⁶²⁶¹ is an apocalyptic number.

It is an amenable number.

626261 is a deficient number, since it is larger than the sum of its proper divisors (1).

626261 is an equidigital number, since it uses as much as digits as its factorization.

626261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 626261 is about 791.3665396010. The cubic root of 626261 is about 85.5562594971.

Adding to 626261 its reverse (162626), we get a palindrome (788887).

The spelling of 626261 in words is "six hundred twenty-six thousand, two hundred sixty-one".