8131145 has 32 divisors (see below), whose sum is σ = 11612160. Its totient is φ = 5400000.

The previous prime is 8131139. The next prime is 8131147. The reversal of 8131145 is 5411318.

It is a de Polignac number, because none of the positive numbers 2^k-8131145 is a prime.

It is a super-2 number, since 2×8131145² = 132231038022050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8131145.

It is not an unprimeable number, because it can be changed into a prime (8131147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32270 + ... + 32520.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^8131145 is an apocalyptic number.

It is an amenable number.

8131145 is a deficient number, since it is larger than the sum of its proper divisors (3481015).

8131145 is a wasteful number, since it uses less digits than its factorization.

8131145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its digits is 480, while the sum is 23.

The square root of 8131145 is about 2851.5162633238. The cubic root of 8131145 is about 201.0869569215.

The spelling of 8131145 in words is "eight million, one hundred thirty-one thousand, one hundred forty-five".