1161380 has 24 divisors (see below), whose sum is σ = 2661120. Its totient is φ = 422240.

The previous prime is 1161371. The next prime is 1161397. The reversal of 1161380 is 831611.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2420 + ... + 2859.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^1161380 is an apocalyptic number.

1161380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161380 is an abundant number, since it is smaller than the sum of its proper divisors (1499740).

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

1161380 is a wasteful number, since it uses less digits than its factorization.

1161380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5299 (or 5297 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1161380 is about 1077.6734199190. The cubic root of 1161380 is about 105.1134073245.

Adding to 1161380 its reverse (831611), we get a palindrome (1992991).

The spelling of 1161380 in words is "one million, one hundred sixty-one thousand, three hundred eighty".