1131262559 has 6 divisors (see below), whose sum is σ = 1315958544. Its totient is φ = 969653580.

The previous prime is 1131262547. The next prime is 1131262589. The reversal of 1131262559 is 9552621311.

It is not a de Polignac number, because 1131262559 - 2²⁴ = 1114485343 is a prime.

It is a super-3 number, since 3×1131262559³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131262589) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11543447 + ... + 11543544.

It is an arithmetic number, because the mean of its divisors is an integer number (219326424).

Almost surely, 2^1131262559 is an apocalyptic number.

1131262559 is a deficient number, since it is larger than the sum of its proper divisors (184695985).

1131262559 is an equidigital number, since it uses as much as digits as its factorization.

1131262559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23087005 (or 23086998 counting only the distinct ones).

The product of its digits is 16200, while the sum is 35.

The square root of 1131262559 is about 33634.2468177898. The cubic root of 1131262559 is about 1041.9682152665.

The spelling of 1131262559 in words is "one billion, one hundred thirty-one million, two hundred sixty-two thousand, five hundred fifty-nine".