8271921 has 8 divisors (see below), whose sum is σ = 12604864. Its totient is φ = 4726800.

The previous prime is 8271889. The next prime is 8271941. The reversal of 8271921 is 1291728.

8271921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8271921 - 2⁵ = 8271889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8271941) 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, 196930 + ... + 196971.

It is an arithmetic number, because the mean of its divisors is an integer number (1575608).

Almost surely, 2^8271921 is an apocalyptic number.

It is an amenable number.

8271921 is a deficient number, since it is larger than the sum of its proper divisors (4332943).

8271921 is a wasteful number, since it uses less digits than its factorization.

8271921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393911.

The product of its digits is 2016, while the sum is 30.

The square root of 8271921 is about 2876.0947480916. The cubic root of 8271921 is about 202.2408084573.

The spelling of 8271921 in words is "eight million, two hundred seventy-one thousand, nine hundred twenty-one".