1143275136 has 128 divisors (see below), whose sum is σ = 3168087360. Its totient is φ = 364953600.

The previous prime is 1143275113. The next prime is 1143275179. The reversal of 1143275136 is 6315723411.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1143275097 and 1143275106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951336 + ... + 952536.

Almost surely, 2^1143275136 is an apocalyptic number.

1143275136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143275136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584043680).

1143275136 is an abundant number, since it is smaller than the sum of its proper divisors (2024812224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1143275136 is a wasteful number, since it uses less digits than its factorization.

1143275136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322 (or 1310 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 1143275136 is about 33812.3518259230. The cubic root of 1143275136 is about 1045.6433653374.

Adding to 1143275136 its reverse (6315723411), we get a palindrome (7458998547).

It can be divided in two parts, 1143275 and 136, that added together give a palindrome (1143411).

The spelling of 1143275136 in words is "one billion, one hundred forty-three million, two hundred seventy-five thousand, one hundred thirty-six".