105200405 has 4 divisors (see below), whose sum is σ = 126240492. Its totient is φ = 84160320.

The previous prime is 105200399. The next prime is 105200423. The reversal of 105200405 is 504002501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34000561 + 71199844 = 5831^2 + 8438^2 .

It is not a de Polignac number, because 105200405 - 2⁸ = 105200149 is a prime.

It is a super-2 number, since 2×105200405² = 22134250424328050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 10520036 + ... + 10520045.

It is an arithmetic number, because the mean of its divisors is an integer number (31560123).

Almost surely, 2^105200405 is an apocalyptic number.

It is an amenable number.

105200405 is a deficient number, since it is larger than the sum of its proper divisors (21040087).

105200405 is an equidigital number, since it uses as much as digits as its factorization.

105200405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21040086.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 105200405 is about 10256.7248671299. The cubic root of 105200405 is about 472.0693499676.

Adding to 105200405 its reverse (504002501), we get a palindrome (609202906).

The spelling of 105200405 in words is "one hundred five million, two hundred thousand, four hundred five".