4191321 has 4 divisors (see below), whose sum is σ = 5588432. Its totient is φ = 2794212.

The previous prime is 4191311. The next prime is 4191329. The reversal of 4191321 is 1231914.

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 not a de Polignac number, because 4191321 - 2⁷ = 4191193 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4191329) 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, 698551 + ... + 698556.

It is an arithmetic number, because the mean of its divisors is an integer number (1397108).

Almost surely, 2^4191321 is an apocalyptic number.

It is an amenable number.

4191321 is a deficient number, since it is larger than the sum of its proper divisors (1397111).

4191321 is a wasteful number, since it uses less digits than its factorization.

4191321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397110.

The product of its digits is 216, while the sum is 21.

The square root of 4191321 is about 2047.2715989824. The cubic root of 4191321 is about 161.2316534622.

The spelling of 4191321 in words is "four million, one hundred ninety-one thousand, three hundred twenty-one".