1129235557 has 4 divisors (see below), whose sum is σ = 1195661196. Its totient is φ = 1062809920.

The previous prime is 1129235551. The next prime is 1129235563. The reversal of 1129235557 is 7555329211.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1129235551) and next prime (1129235563).

It can be written as a sum of positive squares in 2 ways, for example, as 690165441 + 439070116 = 26271^2 + 20954^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129235557 - 2²³ = 1120846949 is a prime.

It is a super-3 number, since 3×1129235557³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129235551) 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, 33212794 + ... + 33212827.

It is an arithmetic number, because the mean of its divisors is an integer number (298915299).

Almost surely, 2^1129235557 is an apocalyptic number.

1129235557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1129235557 is a deficient number, since it is larger than the sum of its proper divisors (66425639).

1129235557 is an equidigital number, since it uses as much as digits as its factorization.

1129235557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66425638.

The product of its digits is 94500, while the sum is 40.

The square root of 1129235557 is about 33604.1003004098. The cubic root of 1129235557 is about 1041.3455085482.

The spelling of 1129235557 in words is "one billion, one hundred twenty-nine million, two hundred thirty-five thousand, five hundred fifty-seven".