1149881 has 2 divisors, whose sum is σ = 1149882. Its totient is φ = 1149880.

The previous prime is 1149859. The next prime is 1149887. The reversal of 1149881 is 1889411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672400 + 477481 = 820^2 + 691^2 .

It is an emirp because it is prime and its reverse (1889411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1149881 - 2⁶ = 1149817 is a prime.

It is a super-2 number, since 2×1149881² = 2644452628322, 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 (1149887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574940 + 574941.

It is an arithmetic number, because the mean of its divisors is an integer number (574941).

2^1149881 is an apocalyptic number.

It is an amenable number.

1149881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149881 is an equidigital number, since it uses as much as digits as its factorization.

1149881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 32.

The square root of 1149881 is about 1072.3250440048. The cubic root of 1149881 is about 104.7653414227.

The spelling of 1149881 in words is "one million, one hundred forty-nine thousand, eight hundred eighty-one".