8142540 has 48 divisors (see below), whose sum is σ = 26057472. Its totient is φ = 1861056.

The previous prime is 8142527. The next prime is 8142557. The reversal of 8142540 is 452418.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8142540.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9274 + ... + 10113.

It is an arithmetic number, because the mean of its divisors is an integer number (542864).

Almost surely, 2^8142540 is an apocalyptic number.

It is an amenable number.

8142540 is an abundant number, since it is smaller than the sum of its proper divisors (17914932).

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

8142540 is a wasteful number, since it uses less digits than its factorization.

8142540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19406 (or 19404 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 8142540 is about 2853.5136235876. The cubic root of 8142540 is about 201.1808476065.

Adding to 8142540 its reverse (452418), we get a palindrome (8594958).

The spelling of 8142540 in words is "eight million, one hundred forty-two thousand, five hundred forty".