105243517 has 2 divisors, whose sum is σ = 105243518. Its totient is φ = 105243516.

The previous prime is 105243499. The next prime is 105243529. The reversal of 105243517 is 715342501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80532676 + 24710841 = 8974^2 + 4971^2 .

It is an emirp because it is prime and its reverse (715342501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105243517 - 2⁷ = 105243389 is a prime.

It is a super-2 number, since 2×105243517² = 22152395741058578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105243557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52621758 + 52621759.

It is an arithmetic number, because the mean of its divisors is an integer number (52621759).

Almost surely, 2^105243517 is an apocalyptic number.

It is an amenable number.

105243517 is a deficient number, since it is larger than the sum of its proper divisors (1).

105243517 is an equidigital number, since it uses as much as digits as its factorization.

105243517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 105243517 is about 10258.8262973890. The cubic root of 105243517 is about 472.1338271412.

It can be divided in two parts, 10524 and 3517, that added together give a palindrome (14041).

The spelling of 105243517 in words is "one hundred five million, two hundred forty-three thousand, five hundred seventeen".