1131427585 has 4 divisors (see below), whose sum is σ = 1357713108. Its totient is φ = 905142064.

The previous prime is 1131427579. The next prime is 1131427589. The reversal of 1131427585 is 5857241311.

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 400320064 + 731107521 = 20008^2 + 27039^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131427585 - 2⁷ = 1131427457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131427589) 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, 113142754 + ... + 113142763.

It is an arithmetic number, because the mean of its divisors is an integer number (339428277).

Almost surely, 2^1131427585 is an apocalyptic number.

It is an amenable number.

1131427585 is a deficient number, since it is larger than the sum of its proper divisors (226285523).

1131427585 is an equidigital number, since it uses as much as digits as its factorization.

1131427585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226285522.

The product of its digits is 33600, while the sum is 37.

The square root of 1131427585 is about 33636.6999719057. The cubic root of 1131427585 is about 1042.0188794513.

Adding to 1131427585 its reverse (5857241311), we get a palindrome (6988668896).

The spelling of 1131427585 in words is "one billion, one hundred thirty-one million, four hundred twenty-seven thousand, five hundred eighty-five".