8021142 has 12 divisors (see below), whose sum is σ = 17379180. Its totient is φ = 2673708.

The previous prime is 8021131. The next prime is 8021147. The reversal of 8021142 is 2411208.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 445619 = 8021142 / (8 + 0 + 2 + 1 + 1 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222792 + ... + 222827.

It is an arithmetic number, because the mean of its divisors is an integer number (1448265).

Almost surely, 2^8021142 is an apocalyptic number.

8021142 is an abundant number, since it is smaller than the sum of its proper divisors (9358038).

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

8021142 is a wasteful number, since it uses less digits than its factorization.

8021142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445627 (or 445624 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 8021142 is about 2832.1620716336. The cubic root of 8021142 is about 200.1760283580.

The spelling of 8021142 in words is "eight million, twenty-one thousand, one hundred forty-two".