822742 has 4 divisors (see below), whose sum is σ = 1234116. Its totient is φ = 411370.

The previous prime is 822739. The next prime is 822743. The reversal of 822742 is 247228.

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

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205684 + ... + 205687.

It is an arithmetic number, because the mean of its divisors is an integer number (308529).

2⁸²²⁷⁴² is an apocalyptic number.

822742 is a deficient number, since it is larger than the sum of its proper divisors (411374).

822742 is a wasteful number, since it uses less digits than its factorization.

822742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411373.

The product of its digits is 1792, while the sum is 25.

The square root of 822742 is about 907.0512664673. The cubic root of 822742 is about 93.7032288182.

The spelling of 822742 in words is "eight hundred twenty-two thousand, seven hundred forty-two".