105140261 has 2 divisors, whose sum is σ = 105140262. Its totient is φ = 105140260.

The previous prime is 105140227. The next prime is 105140297. The reversal of 105140261 is 162041501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52852900 + 52287361 = 7270^2 + 7231^2 .

It is a cyclic number.

It is not a de Polignac number, because 105140261 - 2⁶ = 105140197 is a prime.

It is a super-2 number, since 2×105140261² = 22108948966296242, which contains 22 as substring.

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 (101140261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52570130 + 52570131.

It is an arithmetic number, because the mean of its divisors is an integer number (52570131).

Almost surely, 2^105140261 is an apocalyptic number.

It is an amenable number.

105140261 is a deficient number, since it is larger than the sum of its proper divisors (1).

105140261 is an equidigital number, since it uses as much as digits as its factorization.

105140261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 105140261 is about 10253.7925178931. The cubic root of 105140261 is about 471.9793707469.

Adding to 105140261 its reverse (162041501), we get a palindrome (267181762).

The spelling of 105140261 in words is "one hundred five million, one hundred forty thousand, two hundred sixty-one".