921271 has 4 divisors (see below), whose sum is σ = 992152. Its totient is φ = 850392.

The previous prime is 921259. The next prime is 921287. The reversal of 921271 is 172129.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172129 = 43 ⋅4003.

It is a cyclic number.

It is not a de Polignac number, because 921271 - 2⁷ = 921143 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 (921241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35421 + ... + 35446.

It is an arithmetic number, because the mean of its divisors is an integer number (248038).

2⁹²¹²⁷¹ is an apocalyptic number.

921271 is a deficient number, since it is larger than the sum of its proper divisors (70881).

921271 is a wasteful number, since it uses less digits than its factorization.

921271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70880.

The product of its digits is 252, while the sum is 22.

The square root of 921271 is about 959.8286305378. The cubic root of 921271 is about 97.3036504325.

The spelling of 921271 in words is "nine hundred twenty-one thousand, two hundred seventy-one".