842066 has 4 divisors (see below), whose sum is σ = 1263102. Its totient is φ = 421032.

The previous prime is 842063. The next prime is 842071. The reversal of 842066 is 660248.

842066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 606841 + 235225 = 779^2 + 485^2 .

It is not an unprimeable number, because it can be changed into a prime (842063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210515 + ... + 210518.

2⁸⁴²⁰⁶⁶ is an apocalyptic number.

842066 is the 491-st centered heptagonal number.

842066 is a deficient number, since it is larger than the sum of its proper divisors (421036).

842066 is a wasteful number, since it uses less digits than its factorization.

842066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421035.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 842066 is about 917.6415422157. The cubic root of 842066 is about 94.4311714783.

The spelling of 842066 in words is "eight hundred forty-two thousand, sixty-six".