105100145 has 4 divisors (see below), whose sum is σ = 126120180. Its totient is φ = 84080112.

The previous prime is 105100141. The next prime is 105100159. The reversal of 105100145 is 541001501.

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 68823616 + 36276529 = 8296^2 + 6023^2 .

It is a cyclic number.

It is not a de Polignac number, because 105100145 - 2² = 105100141 is a prime.

It is a super-2 number, since 2×105100145² = 22092080958042050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105100141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10510010 + ... + 10510019.

It is an arithmetic number, because the mean of its divisors is an integer number (31530045).

Almost surely, 2^105100145 is an apocalyptic number.

It is an amenable number.

105100145 is a deficient number, since it is larger than the sum of its proper divisors (21020035).

105100145 is an equidigital number, since it uses as much as digits as its factorization.

105100145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21020034.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 105100145 is about 10251.8361769978. The cubic root of 105100145 is about 471.9193356001.

Adding to 105100145 its reverse (541001501), we get a palindrome (646101646).

The spelling of 105100145 in words is "one hundred five million, one hundred thousand, one hundred forty-five".