8140145 has 16 divisors (see below), whose sum is σ = 10697232. Its totient is φ = 5909760.

The previous prime is 8140133. The next prime is 8140147. The reversal of 8140145 is 5410418.

It can be written as a sum of positive squares in 8 ways, for example, as 2298256 + 5841889 = 1516^2 + 2417^2 .

It is not a de Polignac number, because 8140145 - 2²² = 3945841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8140145.

It is not an unprimeable number, because it can be changed into a prime (8140147) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2939 + ... + 4991.

It is an arithmetic number, because the mean of its divisors is an integer number (668577).

Almost surely, 2^8140145 is an apocalyptic number.

It is an amenable number.

8140145 is a deficient number, since it is larger than the sum of its proper divisors (2557087).

8140145 is a wasteful number, since it uses less digits than its factorization.

8140145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 8140145 is about 2853.0939346611. The cubic root of 8140145 is about 201.1611209455.

The spelling of 8140145 in words is "eight million, one hundred forty thousand, one hundred forty-five".