1189427 has 4 divisors (see below), whose sum is σ = 1197456. Its totient is φ = 1181400.

The previous prime is 1189417. The next prime is 1189453. The reversal of 1189427 is 7249811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7249811 = 19 ⋅381569.

It is a cyclic number.

It is not a de Polignac number, because 1189427 - 2⁸ = 1189171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1189393 and 1189402.

It is not an unprimeable number, because it can be changed into a prime (1189417) 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, 3788 + ... + 4089.

It is an arithmetic number, because the mean of its divisors is an integer number (299364).

2^1189427 is an apocalyptic number.

1189427 is a deficient number, since it is larger than the sum of its proper divisors (8029).

1189427 is an equidigital number, since it uses as much as digits as its factorization.

1189427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028.

The product of its digits is 4032, while the sum is 32.

The square root of 1189427 is about 1090.6085457211. The cubic root of 1189427 is about 105.9528388756.

The spelling of 1189427 in words is "one million, one hundred eighty-nine thousand, four hundred twenty-seven".