1143211263 has 8 divisors (see below), whose sum is σ = 1526880768. Its totient is φ = 760841304.

The previous prime is 1143211261. The next prime is 1143211283. The reversal of 1143211263 is 3621123411.

It is a happy number.

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

It is not a de Polignac number, because 1143211263 - 2¹ = 1143211261 is a prime.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322831 + ... + 326352.

It is an arithmetic number, because the mean of its divisors is an integer number (190860096).

Almost surely, 2^1143211263 is an apocalyptic number.

1143211263 is a deficient number, since it is larger than the sum of its proper divisors (383669505).

1143211263 is an equidigital number, since it uses as much as digits as its factorization.

1143211263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649773.

The product of its digits is 864, while the sum is 24.

The square root of 1143211263 is about 33811.4072910312. The cubic root of 1143211263 is about 1045.6238921531.

Adding to 1143211263 its reverse (3621123411), we get a palindrome (4764334674).

The spelling of 1143211263 in words is "one billion, one hundred forty-three million, two hundred eleven thousand, two hundred sixty-three".