1131206259 has 8 divisors (see below), whose sum is σ = 1511681472. Its totient is φ = 752434280.

The previous prime is 1131206239. The next prime is 1131206267. The reversal of 1131206259 is 9526021311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131206259 - 2²⁰ = 1130157683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131206239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424257 + ... + 426914.

It is an arithmetic number, because the mean of its divisors is an integer number (188960184).

Almost surely, 2^1131206259 is an apocalyptic number.

1131206259 is a deficient number, since it is larger than the sum of its proper divisors (380475213).

1131206259 is an equidigital number, since it uses as much as digits as its factorization.

1131206259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851617.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1131206259 is about 33633.4098628135. The cubic root of 1131206259 is about 1041.9509296290.

The spelling of 1131206259 in words is "one billion, one hundred thirty-one million, two hundred six thousand, two hundred fifty-nine".