1181880 has 144 divisors (see below), whose sum is σ = 4534920. Its totient is φ = 266112.

The previous prime is 1181879. The next prime is 1181881. The reversal of 1181880 is 881811.

It is an interprime number because it is at equal distance from previous prime (1181879) and next prime (1181881).

It is a zygodrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17607 + ... + 17673.

2^1181880 is an apocalyptic number.

1181880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1181880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2267460).

1181880 is an abundant number, since it is smaller than the sum of its proper divisors (3353040).

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

1181880 is a wasteful number, since it uses less digits than its factorization.

1181880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

The square root of 1181880 is about 1087.1430448658. The cubic root of 1181880 is about 105.7282704376.

The spelling of 1181880 in words is "one million, one hundred eighty-one thousand, eight hundred eighty".