506120261 has 2 divisors, whose sum is σ = 506120262. Its totient is φ = 506120260.

The previous prime is 506120249. The next prime is 506120269. The reversal of 506120261 is 162021605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310288225 + 195832036 = 17615^2 + 13994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506120261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506120269) 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, 253060130 + 253060131.

It is an arithmetic number, because the mean of its divisors is an integer number (253060131).

Almost surely, 2^506120261 is an apocalyptic number.

It is an amenable number.

506120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

506120261 is an equidigital number, since it uses as much as digits as its factorization.

506120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 506120261 is about 22497.1167263718. The cubic root of 506120261 is about 796.9258379787.

Adding to 506120261 its reverse (162021605), we get a palindrome (668141866).

The spelling of 506120261 in words is "five hundred six million, one hundred twenty thousand, two hundred sixty-one".