1189281 has 4 divisors (see below), whose sum is σ = 1585712. Its totient is φ = 792852.

The previous prime is 1189277. The next prime is 1189301. The reversal of 1189281 is 1829811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1189281 - 2² = 1189277 is a prime.

It is a super-2 number, since 2×1189281² = 2828778593922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1189231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198211 + ... + 198216.

It is an arithmetic number, because the mean of its divisors is an integer number (396428).

2^1189281 is an apocalyptic number.

It is an amenable number.

1189281 is a deficient number, since it is larger than the sum of its proper divisors (396431).

1189281 is an equidigital number, since it uses as much as digits as its factorization.

1189281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396430.

The product of its digits is 1152, while the sum is 30.

The square root of 1189281 is about 1090.5416085597. The cubic root of 1189281 is about 105.9485035255.

The spelling of 1189281 in words is "one million, one hundred eighty-nine thousand, two hundred eighty-one".