1131230539 has 4 divisors (see below), whose sum is σ = 1136973024. Its totient is φ = 1125488056.

The previous prime is 1131230537. The next prime is 1131230561. The reversal of 1131230539 is 9350321311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9350321311 = 431 ⋅21694481.

It is a cyclic number.

It is not a de Polignac number, because 1131230539 - 2¹ = 1131230537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131230533) 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, 2870947 + ... + 2871340.

It is an arithmetic number, because the mean of its divisors is an integer number (284243256).

Almost surely, 2^1131230539 is an apocalyptic number.

1131230539 is a deficient number, since it is larger than the sum of its proper divisors (5742485).

1131230539 is an equidigital number, since it uses as much as digits as its factorization.

1131230539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742484.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 1131230539 is about 33633.7708114924. The cubic root of 1131230539 is about 1041.9583843224.

The spelling of 1131230539 in words is "one billion, one hundred thirty-one million, two hundred thirty thousand, five hundred thirty-nine".