1181969 has 2 divisors, whose sum is σ = 1181970. Its totient is φ = 1181968.

The previous prime is 1181963. The next prime is 1181981. The reversal of 1181969 is 9691811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1181569 + 400 = 1087^2 + 20^2 .

It is an emirp because it is prime and its reverse (9691811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1181969 - 2¹² = 1177873 is a prime.

It is a super-2 number, since 2×1181969² = 2794101433922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1181963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 590984 + 590985.

It is an arithmetic number, because the mean of its divisors is an integer number (590985).

2^1181969 is an apocalyptic number.

It is an amenable number.

1181969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1181969 is an equidigital number, since it uses as much as digits as its factorization.

1181969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 35.

The square root of 1181969 is about 1087.1839770710. The cubic root of 1181969 is about 105.7309242829.

The spelling of 1181969 in words is "one million, one hundred eighty-one thousand, nine hundred sixty-nine".