73105145 has 8 divisors (see below), whose sum is σ = 89164680. Its totient is φ = 57525120.

The previous prime is 73105139. The next prime is 73105169. The reversal of 73105145 is 54150137.

It can be written as a sum of positive squares in 4 ways, for example, as 4414201 + 68690944 = 2101^2 + 8288^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73105145 - 2²² = 68910841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119540 + ... + 120149.

It is an arithmetic number, because the mean of its divisors is an integer number (11145585).

Almost surely, 2^73105145 is an apocalyptic number.

It is an amenable number.

73105145 is a deficient number, since it is larger than the sum of its proper divisors (16059535).

73105145 is a wasteful number, since it uses less digits than its factorization.

73105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239755.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 73105145 is about 8550.1546769635. The cubic root of 73105145 is about 418.1344793681.

The spelling of 73105145 in words is "seventy-three million, one hundred five thousand, one hundred forty-five".