9121217 has 4 divisors (see below), whose sum is σ = 10424256. Its totient is φ = 7818180.

The previous prime is 9121213. The next prime is 9121241. The reversal of 9121217 is 7121219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9121217 - 2² = 9121213 is a prime.

It is a super-2 number, since 2×9121217² = 166393199122178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9121192 and 9121201.

It is not an unprimeable number, because it can be changed into a prime (9121213) 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 3 ways as a sum of consecutive naturals, for example, 651509 + ... + 651522.

It is an arithmetic number, because the mean of its divisors is an integer number (2606064).

Almost surely, 2^9121217 is an apocalyptic number.

It is an amenable number.

9121217 is a deficient number, since it is larger than the sum of its proper divisors (1303039).

9121217 is a wasteful number, since it uses less digits than its factorization.

9121217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303038.

The product of its digits is 252, while the sum is 23.

The square root of 9121217 is about 3020.1352618716. The cubic root of 9121217 is about 208.9380783112.

The spelling of 9121217 in words is "nine million, one hundred twenty-one thousand, two hundred seventeen".