1161320 has 16 divisors (see below), whose sum is σ = 2613060. Its totient is φ = 464512.

The previous prime is 1161317. The next prime is 1161331. The reversal of 1161320 is 231611.

It can be written as a sum of positive squares in 2 ways, for example, as 1136356 + 24964 = 1066^2 + 158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1161295 and 1161304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14477 + ... + 14556.

2^1161320 is an apocalyptic number.

1161320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161320 is an abundant number, since it is smaller than the sum of its proper divisors (1451740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161320 is a wasteful number, since it uses less digits than its factorization.

1161320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29044 (or 29040 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1161320 is about 1077.6455818125. The cubic root of 1161320 is about 105.1115971466. Note that the first 3 decimals are identical.

Adding to 1161320 its reverse (231611), we get a palindrome (1392931).

The spelling of 1161320 in words is "one million, one hundred sixty-one thousand, three hundred twenty".