7161321 has 4 divisors (see below), whose sum is σ = 9548432. Its totient is φ = 4774212.

The previous prime is 7161317. The next prime is 7161331. The reversal of 7161321 is 1231617.

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 7161321 - 2² = 7161317 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 (7161331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193551 + ... + 1193556.

It is an arithmetic number, because the mean of its divisors is an integer number (2387108).

Almost surely, 2^7161321 is an apocalyptic number.

It is an amenable number.

7161321 is a deficient number, since it is larger than the sum of its proper divisors (2387111).

7161321 is a wasteful number, since it uses less digits than its factorization.

7161321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387110.

The product of its digits is 252, while the sum is 21.

The square root of 7161321 is about 2676.0644611070. The cubic root of 7161321 is about 192.7514765860.

Adding to 7161321 its reverse (1231617), we get a palindrome (8392938).

The spelling of 7161321 in words is "seven million, one hundred sixty-one thousand, three hundred twenty-one".