1143135225 has 36 divisors (see below), whose sum is σ = 2051310300. Its totient is φ = 608532480.

The previous prime is 1143135223. The next prime is 1143135277. The reversal of 1143135225 is 5225313411.

1143135225 is a `hidden beast` number, since 1 + 1 + 431 + 3 + 5 + 225 = 666.

1143135225 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 386830224 + 756305001 = 19668^2 + 27501^2 .

It is not a de Polignac number, because 1143135225 - 2¹ = 1143135223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1143135223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123561 + ... + 132489.

Almost surely, 2^1143135225 is an apocalyptic number.

1143135225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1143135225 is a deficient number, since it is larger than the sum of its proper divisors (908175075).

1143135225 is a wasteful number, since it uses less digits than its factorization.

1143135225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514 (or 9506 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1143135225 is about 33810.2828293405. The cubic root of 1143135225 is about 1045.6007092370.

Adding to 1143135225 its reverse (5225313411), we get a palindrome (6368448636).

It can be divided in two parts, 11431 and 35225, that added together give a 6-th power (46656 = 6⁶).

The spelling of 1143135225 in words is "one billion, one hundred forty-three million, one hundred thirty-five thousand, two hundred twenty-five".