8143140 has 24 divisors (see below), whose sum is σ = 22800960. Its totient is φ = 2171488.

The previous prime is 8143129. The next prime is 8143141. The reversal of 8143140 is 413418.

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, 67800 + ... + 67919.

It is an arithmetic number, because the mean of its divisors is an integer number (950040).

Almost surely, 2^8143140 is an apocalyptic number.

It is an amenable number.

8143140 is an abundant number, since it is smaller than the sum of its proper divisors (14657820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8143140 is a wasteful number, since it uses less digits than its factorization.

8143140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135731 (or 135729 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 8143140 is about 2853.6187551949. The cubic root of 8143140 is about 201.1857889616.

Adding to 8143140 its reverse (413418), we get a palindrome (8556558).

The spelling of 8143140 in words is "eight million, one hundred forty-three thousand, one hundred forty".