1189280 has 24 divisors (see below), whose sum is σ = 2810052. Its totient is φ = 475648.

The previous prime is 1189277. The next prime is 1189301. The reversal of 1189280 is 829811.

It can be written as a sum of positive squares in 2 ways, for example, as 1056784 + 132496 = 1028^2 + 364^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3557 + ... + 3876.

2^1189280 is an apocalyptic number.

1189280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189280 is an abundant number, since it is smaller than the sum of its proper divisors (1620772).

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

1189280 is an equidigital number, since it uses as much as digits as its factorization.

1189280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448 (or 7440 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1189280 is about 1090.5411500718. The cubic root of 1189280 is about 105.9484738301.

The spelling of 1189280 in words is "one million, one hundred eighty-nine thousand, two hundred eighty".