104240261 has 2 divisors, whose sum is σ = 104240262. Its totient is φ = 104240260.

The previous prime is 104240221. The next prime is 104240267. The reversal of 104240261 is 162042401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72148036 + 32092225 = 8494^2 + 5665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104240261 is a prime.

It is a Sophie Germain 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 (104240267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52120130 + 52120131.

It is an arithmetic number, because the mean of its divisors is an integer number (52120131).

Almost surely, 2^104240261 is an apocalyptic number.

It is an amenable number.

104240261 is a deficient number, since it is larger than the sum of its proper divisors (1).

104240261 is an equidigital number, since it uses as much as digits as its factorization.

104240261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 104240261 is about 10209.8119963102. The cubic root of 104240261 is about 470.6287962260.

Adding to 104240261 its reverse (162042401), we get a palindrome (266282662).

The spelling of 104240261 in words is "one hundred four million, two hundred forty thousand, two hundred sixty-one".