8142140 has 24 divisors (see below), whose sum is σ = 17156832. Its totient is φ = 3245760.

The previous prime is 8142137. The next prime is 8142151. The reversal of 8142140 is 412418.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7937 + ... + 8903.

It is an arithmetic number, because the mean of its divisors is an integer number (714868).

Almost surely, 2^8142140 is an apocalyptic number.

It is an amenable number.

8142140 is an abundant number, since it is smaller than the sum of its proper divisors (9014692).

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

8142140 is a wasteful number, since it uses less digits than its factorization.

8142140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 8142140 is about 2853.4435336975. The cubic root of 8142140 is about 201.1775532350.

Adding to 8142140 its reverse (412418), we get a palindrome (8554558).

The spelling of 8142140 in words is "eight million, one hundred forty-two thousand, one hundred forty".