1131005 has 4 divisors (see below), whose sum is σ = 1357212. Its totient is φ = 904800.

The previous prime is 1130981. The next prime is 1131023. The reversal of 1131005 is 5001311.

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 857476 + 273529 = 926^2 + 523^2 .

It is not a de Polignac number, because 1131005 - 2¹⁶ = 1065469 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113096 + ... + 113105.

It is an arithmetic number, because the mean of its divisors is an integer number (339303).

2^1131005 is an apocalyptic number.

It is an amenable number.

1131005 is a deficient number, since it is larger than the sum of its proper divisors (226207).

1131005 is an equidigital number, since it uses as much as digits as its factorization.

1131005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226206.

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

The square root of 1131005 is about 1063.4871884513. The cubic root of 1131005 is about 104.1889132929.

Adding to 1131005 its reverse (5001311), we get a palindrome (6132316).

The spelling of 1131005 in words is "one million, one hundred thirty-one thousand, five".