1135509 has 4 divisors (see below), whose sum is σ = 1514016. Its totient is φ = 757004.

The previous prime is 1135483. The next prime is 1135513. The reversal of 1135509 is 9055311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9055311 = 3 ⋅3018437.

It is a cyclic number.

It is not a de Polignac number, because 1135509 - 2¹² = 1131413 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189249 + ... + 189254.

It is an arithmetic number, because the mean of its divisors is an integer number (378504).

2^1135509 is an apocalyptic number.

It is an amenable number.

1135509 is a deficient number, since it is larger than the sum of its proper divisors (378507).

1135509 is an equidigital number, since it uses as much as digits as its factorization.

1135509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378506.

The product of its (nonzero) digits is 675, while the sum is 24.

The square root of 1135509 is about 1065.6026463931. The cubic root of 1135509 is about 104.3270339083.

The spelling of 1135509 in words is "one million, one hundred thirty-five thousand, five hundred nine".