9111421 has 12 divisors (see below), whose sum is σ = 10088316. Its totient is φ = 8222720.

The previous prime is 9111341. The next prime is 9111449. The reversal of 9111421 is 1241119.

9111421 = T₃₂₆ + T₃₂₇ + ... + T₄₄₆.

9111421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8820900 + 290521 = 2970^2 + 539^2 .

It is not a de Polignac number, because 9111421 - 2²¹ = 7014269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9111461) 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 11 ways as a sum of consecutive naturals, for example, 30951 + ... + 31243.

It is an arithmetic number, because the mean of its divisors is an integer number (840693).

Almost surely, 2^9111421 is an apocalyptic number.

It is an amenable number.

9111421 is a deficient number, since it is larger than the sum of its proper divisors (976895).

9111421 is a wasteful number, since it uses less digits than its factorization.

9111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 561 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

The square root of 9111421 is about 3018.5130445304. The cubic root of 9111421 is about 208.8632531142.

It can be divided in two parts, 911 and 1421, that added together give a palindrome (2332).

The spelling of 9111421 in words is "nine million, one hundred eleven thousand, four hundred twenty-one".