105615145 has 4 divisors (see below), whose sum is σ = 126738180. Its totient is φ = 84492112.

The previous prime is 105615113. The next prime is 105615163. The reversal of 105615145 is 541516501.

It is a happy number.

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 51724864 + 53890281 = 7192^2 + 7341^2 .

It is a cyclic number.

It is not a de Polignac number, because 105615145 - 2⁵ = 105615113 is a prime.

It is a super-2 number, since 2×105615145² = 22309117706742050, which contains 22 as substring.

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, 10561510 + ... + 10561519.

It is an arithmetic number, because the mean of its divisors is an integer number (31684545).

Almost surely, 2^105615145 is an apocalyptic number.

It is an amenable number.

105615145 is a deficient number, since it is larger than the sum of its proper divisors (21123035).

105615145 is an equidigital number, since it uses as much as digits as its factorization.

105615145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21123034.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 105615145 is about 10276.9229344196. The cubic root of 105615145 is about 472.6888954803.

The spelling of 105615145 in words is "one hundred five million, six hundred fifteen thousand, one hundred forty-five".