1135381 has 4 divisors (see below), whose sum is σ = 1222732. Its totient is φ = 1048032.

The previous prime is 1135367. The next prime is 1135403. The reversal of 1135381 is 1835311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1835311 = 37 ⋅49603.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 940900 = 441^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135381 - 2¹¹ = 1133333 is a prime.

It is a super-2 number, since 2×1135381² = 2578180030322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135081) 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, 43656 + ... + 43681.

It is an arithmetic number, because the mean of its divisors is an integer number (305683).

2^1135381 is an apocalyptic number.

It is an amenable number.

1135381 is a deficient number, since it is larger than the sum of its proper divisors (87351).

1135381 is an equidigital number, since it uses as much as digits as its factorization.

1135381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87350.

The product of its digits is 360, while the sum is 22.

The square root of 1135381 is about 1065.5425847896. The cubic root of 1135381 is about 104.3231136804.

The spelling of 1135381 in words is "one million, one hundred thirty-five thousand, three hundred eighty-one".