8143145 has 8 divisors (see below), whose sum is σ = 10036104. Its totient is φ = 6338304.

The previous prime is 8143141. The next prime is 8143147. The reversal of 8143145 is 5413418.

It can be written as a sum of positive squares in 4 ways, for example, as 3429904 + 4713241 = 1852^2 + 2171^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8143145 - 2² = 8143141 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8143141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21824 + ... + 22193.

It is an arithmetic number, because the mean of its divisors is an integer number (1254513).

Almost surely, 2^8143145 is an apocalyptic number.

It is an amenable number.

8143145 is a deficient number, since it is larger than the sum of its proper divisors (1892959).

8143145 is a wasteful number, since it uses less digits than its factorization.

8143145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44059.

The product of its digits is 1920, while the sum is 26.

The square root of 8143145 is about 2853.6196312753. The cubic root of 8143145 is about 201.1858301385.

The spelling of 8143145 in words is "eight million, one hundred forty-three thousand, one hundred forty-five".