123568261 has 2 divisors, whose sum is σ = 123568262. Its totient is φ = 123568260.

The previous prime is 123568231. The next prime is 123568273. The reversal of 123568261 is 162865321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123432100 + 136161 = 11110^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 123568261 - 2¹¹ = 123566213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123568231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61784130 + 61784131.

It is an arithmetic number, because the mean of its divisors is an integer number (61784131).

Almost surely, 2^123568261 is an apocalyptic number.

It is an amenable number.

123568261 is a deficient number, since it is larger than the sum of its proper divisors (1).

123568261 is an equidigital number, since it uses as much as digits as its factorization.

123568261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 123568261 is about 11116.1261687694. The cubic root of 123568261 is about 498.0836794810.

It can be divided in two parts, 1235 and 68261, that added together give a palindrome (69496).

The spelling of 123568261 in words is "one hundred twenty-three million, five hundred sixty-eight thousand, two hundred sixty-one".