8731145 has 12 divisors (see below), whose sum is σ = 10956036. Its totient is φ = 6679200.

The previous prime is 8731141. The next prime is 8731153. The reversal of 8731145 is 5411378.

It can be written as a sum of positive squares in 2 ways, for example, as 2446096 + 6285049 = 1564^2 + 2507^2 .

It is not a de Polignac number, because 8731145 - 2² = 8731141 is a prime.

It is a super-2 number, since 2×8731145² = 152465786022050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8731141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 995 + ... + 4295.

It is an arithmetic number, because the mean of its divisors is an integer number (913003).

Almost surely, 2^8731145 is an apocalyptic number.

It is an amenable number.

8731145 is a deficient number, since it is larger than the sum of its proper divisors (2224891).

8731145 is a wasteful number, since it uses less digits than its factorization.

8731145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352 (or 3329 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 8731145 is about 2954.8510960791. The cubic root of 8731145 is about 205.9161455296.

The spelling of 8731145 in words is "eight million, seven hundred thirty-one thousand, one hundred forty-five".