820142 has 8 divisors (see below), whose sum is σ = 1263576. Its totient is φ = 398952.

The previous prime is 820133. The next prime is 820163. The reversal of 820142 is 241028.

820142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 820142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5468 + ... + 5615.

It is an arithmetic number, because the mean of its divisors is an integer number (157947).

2⁸²⁰¹⁴² is an apocalyptic number.

820142 is a deficient number, since it is larger than the sum of its proper divisors (443434).

820142 is a wasteful number, since it uses less digits than its factorization.

820142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 820142 is about 905.6169168031. The cubic root of 820142 is about 93.6044187896.

The spelling of 820142 in words is "eight hundred twenty thousand, one hundred forty-two".