105100405 has 4 divisors (see below), whose sum is σ = 126120492. Its totient is φ = 84080320.

The previous prime is 105100361. The next prime is 105100423. The reversal of 105100405 is 504001501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504001501 = 10657 ⋅47293.

It can be written as a sum of positive squares in 2 ways, for example, as 80120401 + 24980004 = 8951^2 + 4998^2 .

It is not a de Polignac number, because 105100405 - 2¹³ = 105092213 is a prime.

It is a super-2 number, since 2×105100405² = 22092190262328050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10510036 + ... + 10510045.

It is an arithmetic number, because the mean of its divisors is an integer number (31530123).

Almost surely, 2^105100405 is an apocalyptic number.

It is an amenable number.

105100405 is a deficient number, since it is larger than the sum of its proper divisors (21020087).

105100405 is an equidigital number, since it uses as much as digits as its factorization.

105100405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21020086.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 105100405 is about 10251.8488576451. The cubic root of 105100405 is about 471.9197247493.

Adding to 105100405 its reverse (504001501), we get a palindrome (609101906).

The spelling of 105100405 in words is "one hundred five million, one hundred thousand, four hundred five".