9171421 has 8 divisors (see below), whose sum is σ = 10512320. Its totient is φ = 7838208.

The previous prime is 9171401. The next prime is 9171431. The reversal of 9171421 is 1241719.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9171421 - 2¹¹ = 9169373 is a prime.

It is a super-2 number, since 2×9171421² = 168229926318482, which contains 22 as substring.

9171421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9171401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925 + ... + 4381.

It is an arithmetic number, because the mean of its divisors is an integer number (1314040).

Almost surely, 2^9171421 is an apocalyptic number.

It is an amenable number.

9171421 is a deficient number, since it is larger than the sum of its proper divisors (1340899).

9171421 is a wasteful number, since it uses less digits than its factorization.

9171421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3843.

The product of its digits is 504, while the sum is 25.

The square root of 9171421 is about 3028.4354046273. The cubic root of 9171421 is about 209.3207151463.

The spelling of 9171421 in words is "nine million, one hundred seventy-one thousand, four hundred twenty-one".