1142133281 has 2 divisors, whose sum is σ = 1142133282. Its totient is φ = 1142133280.

The previous prime is 1142133271. The next prime is 1142133299. The reversal of 1142133281 is 1823312411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1017610000 + 124523281 = 31900^2 + 11159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142133281 is a prime.

It is a super-2 number, since 2×1142133281² = 2608936863135649922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142133281.

It is not a weakly prime, because it can be changed into another prime (1142133221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571066640 + 571066641.

It is an arithmetic number, because the mean of its divisors is an integer number (571066641).

Almost surely, 2^1142133281 is an apocalyptic number.

It is an amenable number.

1142133281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142133281 is an equidigital number, since it uses as much as digits as its factorization.

1142133281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 1142133281 is about 33795.4624321077. The cubic root of 1142133281 is about 1045.2951345442.

Adding to 1142133281 its reverse (1823312411), we get a palindrome (2965445692).

The spelling of 1142133281 in words is "one billion, one hundred forty-two million, one hundred thirty-three thousand, two hundred eighty-one".