1189231 has 2 divisors, whose sum is σ = 1189232. Its totient is φ = 1189230.
The previous prime is 1189219. The next prime is 1189271. The reversal of 1189231 is 1329811.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 1189231 - 213 = 1181039 is a prime.
It is a super-2 number, since 2×11892312 = 2828540742722, which contains 22 as substring.
It is a plaindrome in base 16.
It is a junction number, because it is equal to n+sod(n) for n = 1189196 and 1189205.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1189271) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594615 + 594616.
It is an arithmetic number, because the mean of its divisors is an integer number (594616).
21189231 is an apocalyptic number.
1189231 is a deficient number, since it is larger than the sum of its proper divisors (1).
1189231 is an equidigital number, since it uses as much as digits as its factorization.
1189231 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 432, while the sum is 25.
The square root of 1189231 is about 1090.5186839298. The cubic root of 1189231 is about 105.9470187350.
The spelling of 1189231 in words is "one million, one hundred eighty-nine thousand, two hundred thirty-one".
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