922421 has 4 divisors (see below), whose sum is σ = 929292. Its totient is φ = 915552.

The previous prime is 922391. The next prime is 922423. The reversal of 922421 is 124229.

922421 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, and also an emirpimes, since its reverse is a distinct semiprime: 124229 = 7 ⋅17747.

It can be written as a sum of positive squares in 2 ways, for example, as 792100 + 130321 = 890^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 922421 - 2⁶ = 922357 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 922393 and 922402.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 922421.

It is not an unprimeable number, because it can be changed into a prime (922423) 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, 3230 + ... + 3503.

It is an arithmetic number, because the mean of its divisors is an integer number (232323).

2⁹²²⁴²¹ is an apocalyptic number.

It is an amenable number.

922421 is a deficient number, since it is larger than the sum of its proper divisors (6871).

922421 is a wasteful number, since it uses less digits than its factorization.

922421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6870.

The product of its digits is 288, while the sum is 20.

The square root of 922421 is about 960.4275089771. The cubic root of 922421 is about 97.3441208514.

The spelling of 922421 in words is "nine hundred twenty-two thousand, four hundred twenty-one".