1181320 has 32 divisors (see below), whose sum is σ = 3038400. Its totient is φ = 404928.

The previous prime is 1181311. The next prime is 1181321. The reversal of 1181320 is 231811.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1181294 and 1181303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181321) 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, 1830 + ... + 2389.

It is an arithmetic number, because the mean of its divisors is an integer number (94950).

2^1181320 is an apocalyptic number.

1181320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181320 is an abundant number, since it is smaller than the sum of its proper divisors (1857080).

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

1181320 is a wasteful number, since it uses less digits than its factorization.

1181320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1181320 is about 1086.8854585466. The cubic root of 1181320 is about 105.7115690282.

The spelling of 1181320 in words is "one million, one hundred eighty-one thousand, three hundred twenty".