822427 has 4 divisors (see below), whose sum is σ = 824400. Its totient is φ = 820456.

The previous prime is 822407. The next prime is 822431. The reversal of 822427 is 724228.

822427 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 is a cyclic number.

It is not a de Polignac number, because 822427 - 2⁷ = 822299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (822407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88 + ... + 1285.

It is an arithmetic number, because the mean of its divisors is an integer number (206100).

2⁸²²⁴²⁷ is an apocalyptic number.

822427 is a deficient number, since it is larger than the sum of its proper divisors (1973).

822427 is a wasteful number, since it uses less digits than its factorization.

822427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972.

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

The square root of 822427 is about 906.8776102650. The cubic root of 822427 is about 93.6912686959.

The spelling of 822427 in words is "eight hundred twenty-two thousand, four hundred twenty-seven".