9401221 has 4 divisors (see below), whose sum is σ = 9954252. Its totient is φ = 8848192.

The previous prime is 9401213. The next prime is 9401233. The reversal of 9401221 is 1221049.

9401221 is digitally balanced in base 3, 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 2 ways, for example, as 3101121 + 6300100 = 1761^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 9401221 - 2³ = 9401213 is a prime.

It is a Duffinian number.

9401221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9401921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276490 + ... + 276523.

It is an arithmetic number, because the mean of its divisors is an integer number (2488563).

Almost surely, 2^9401221 is an apocalyptic number.

It is an amenable number.

9401221 is a deficient number, since it is larger than the sum of its proper divisors (553031).

9401221 is a wasteful number, since it uses less digits than its factorization.

9401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553030.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 9401221 is about 3066.1410600297. The cubic root of 9401221 is about 211.0545668715.

The spelling of 9401221 in words is "nine million, four hundred one thousand, two hundred twenty-one".