1157089 has 4 divisors (see below), whose sum is σ = 1170180. Its totient is φ = 1144000.

The previous prime is 1157077. The next prime is 1157099. The reversal of 1157089 is 9807511.

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 90000 + 1067089 = 300^2 + 1033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157089 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1157089.

It is not an unprimeable number, because it can be changed into a prime (1157059) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6412 + ... + 6589.

It is an arithmetic number, because the mean of its divisors is an integer number (292545).

2^1157089 is an apocalyptic number.

It is an amenable number.

1157089 is a deficient number, since it is larger than the sum of its proper divisors (13091).

1157089 is an equidigital number, since it uses as much as digits as its factorization.

1157089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13090.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 1157089 is about 1075.6807147105. The cubic root of 1157089 is about 104.9837919049.

The spelling of 1157089 in words is "one million, one hundred fifty-seven thousand, eighty-nine".