1189021 has 2 divisors, whose sum is σ = 1189022. Its totient is φ = 1189020.

The previous prime is 1189007. The next prime is 1189033. The reversal of 1189021 is 1209811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 168921 = 1010^2 + 411^2 .

It is an emirp because it is prime and its reverse (1209811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1189021 - 2¹¹ = 1186973 is a prime.

1189021 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1188983 and 1189001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1189061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594510 + 594511.

It is an arithmetic number, because the mean of its divisors is an integer number (594511).

2^1189021 is an apocalyptic number.

It is an amenable number.

1189021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189021 is an equidigital number, since it uses as much as digits as its factorization.

1189021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1189021 is about 1090.4223952212. The cubic root of 1189021 is about 105.9407821603.

It can be divided in two parts, 11890 and 21, that added together give a palindrome (11911).

The spelling of 1189021 in words is "one million, one hundred eighty-nine thousand, twenty-one".