1001135 has 4 divisors (see below), whose sum is σ = 1201368. Its totient is φ = 800904.

The previous prime is 1001123. The next prime is 1001153. The reversal of 1001135 is 5311001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5311001 = 1109 ⋅4789.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100109 + ... + 100118.

It is an arithmetic number, because the mean of its divisors is an integer number (300342).

2^1001135 is an apocalyptic number.

1001135 is a deficient number, since it is larger than the sum of its proper divisors (200233).

1001135 is an equidigital number, since it uses as much as digits as its factorization.

1001135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200232.

The product of its (nonzero) digits is 15, while the sum is 11.

The square root of 1001135 is about 1000.5673390632. The cubic root of 1001135 is about 100.0378190287.

Adding to 1001135 its reverse (5311001), we get a palindrome (6312136).

The spelling of 1001135 in words is "one million, one thousand, one hundred thirty-five".