9722421 has 6 divisors (see below), whose sum is σ = 14043510. Its totient is φ = 6481608.

The previous prime is 9722413. The next prime is 9722441. The reversal of 9722421 is 1242279.

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 44100 = 3111^2 + 210^2 .

It is not a de Polignac number, because 9722421 - 2³ = 9722413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9722411) 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 in 5 ways as a sum of consecutive naturals, for example, 540126 + ... + 540143.

It is an arithmetic number, because the mean of its divisors is an integer number (2340585).

Almost surely, 2^9722421 is an apocalyptic number.

It is an amenable number.

9722421 is a deficient number, since it is larger than the sum of its proper divisors (4321089).

9722421 is a wasteful number, since it uses less digits than its factorization.

9722421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080275 (or 1080272 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 9722421 is about 3118.0796975061. The cubic root of 9722421 is about 213.4313153967.

The spelling of 9722421 in words is "nine million, seven hundred twenty-two thousand, four hundred twenty-one".