1143211265 has 8 divisors (see below), whose sum is σ = 1567832640. Its totient is φ = 783916272.

The previous prime is 1143211261. The next prime is 1143211283. The reversal of 1143211265 is 5621123411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143211265 - 2² = 1143211261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143211261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16331555 + ... + 16331624.

It is an arithmetic number, because the mean of its divisors is an integer number (195979080).

Almost surely, 2^1143211265 is an apocalyptic number.

It is an amenable number.

1143211265 is a deficient number, since it is larger than the sum of its proper divisors (424621375).

1143211265 is an equidigital number, since it uses as much as digits as its factorization.

1143211265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32663191.

The product of its digits is 1440, while the sum is 26.

The square root of 1143211265 is about 33811.4073206070. The cubic root of 1143211265 is about 1045.6238927628.

Adding to 1143211265 its reverse (5621123411), we get a palindrome (6764334676).

The spelling of 1143211265 in words is "one billion, one hundred forty-three million, two hundred eleven thousand, two hundred sixty-five".