1161321 has 16 divisors (see below), whose sum is σ = 1874304. Its totient is φ = 624384.

The previous prime is 1161317. The next prime is 1161331. The reversal of 1161321 is 1231611.

It is not a de Polignac number, because 1161321 - 2² = 1161317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1161321.

It is not an unprimeable number, because it can be changed into a prime (1161331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270 + ... + 1983.

It is an arithmetic number, because the mean of its divisors is an integer number (117144).

2^1161321 is an apocalyptic number.

It is an amenable number.

1161321 is a deficient number, since it is larger than the sum of its proper divisors (712983).

1161321 is a wasteful number, since it uses less digits than its factorization.

1161321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280.

The product of its digits is 36, while the sum is 15.

The square root of 1161321 is about 1077.6460457868. The cubic root of 1161321 is about 105.1116273168. Note that the first 3 decimals are identical.

Adding to 1161321 its reverse (1231611), we get a palindrome (2392932).

The spelling of 1161321 in words is "one million, one hundred sixty-one thousand, three hundred twenty-one".