1135531 has 2 divisors, whose sum is σ = 1135532. Its totient is φ = 1135530.

The previous prime is 1135513. The next prime is 1135597. The reversal of 1135531 is 1355311.

Together with previous prime (1135513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1355311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1135531 - 2⁷ = 1135403 is a prime.

It is a super-2 number, since 2×1135531² = 2578861303922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1135499 and 1135508.

It is not a weakly prime, because it can be changed into another prime (1135831) 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 as a sum of consecutive naturals, namely, 567765 + 567766.

It is an arithmetic number, because the mean of its divisors is an integer number (567766).

2^1135531 is an apocalyptic number.

1135531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135531 is an equidigital number, since it uses as much as digits as its factorization.

1135531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225, while the sum is 19.

The square root of 1135531 is about 1065.6129691403. The cubic root of 1135531 is about 104.3277076678.

The spelling of 1135531 in words is "one million, one hundred thirty-five thousand, five hundred thirty-one".