1089841 has 2 divisors, whose sum is σ = 1089842. Its totient is φ = 1089840.

The previous prime is 1089799. The next prime is 1089863. The reversal of 1089841 is 1489801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 279841 = 900^2 + 529^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089841 - 2⁷ = 1089713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1089941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544920 + 544921.

It is an arithmetic number, because the mean of its divisors is an integer number (544921).

2^1089841 is an apocalyptic number.

It is an amenable number.

1089841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089841 is an equidigital number, since it uses as much as digits as its factorization.

1089841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1089841 is about 1043.9545009243. The cubic root of 1089841 is about 102.9092423266.

It can be divided in two parts, 1089 and 841, that multiplied together give a square (915849 = 957²).

The spelling of 1089841 in words is "one million, eighty-nine thousand, eight hundred forty-one".