1089761 has 4 divisors (see below), whose sum is σ = 1119252. Its totient is φ = 1060272.

The previous prime is 1089757. The next prime is 1089793. The reversal of 1089761 is 1679801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 776161 + 313600 = 881^2 + 560^2 .

It is not a de Polignac number, because 1089761 - 2² = 1089757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1089161) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14690 + ... + 14763.

It is an arithmetic number, because the mean of its divisors is an integer number (279813).

2^1089761 is an apocalyptic number.

It is an amenable number.

1089761 is a deficient number, since it is larger than the sum of its proper divisors (29491).

1089761 is an equidigital number, since it uses as much as digits as its factorization.

1089761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29490.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1089761 is about 1043.9161843750. The cubic root of 1089761 is about 102.9067242404.

The spelling of 1089761 in words is "one million, eighty-nine thousand, seven hundred sixty-one".