1143265266 has 160 divisors (see below), whose sum is σ = 3187755648. Its totient is φ = 300879360.

The previous prime is 1143265259. The next prime is 1143265273. The reversal of 1143265266 is 6625623411.

It is an interprime number because it is at equal distance from previous prime (1143265259) and next prime (1143265273).

It is a super-3 number, since 3×1143265266³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1143265266.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 392371 + ... + 395273.

Almost surely, 2^1143265266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143265266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1593877824).

1143265266 is an abundant number, since it is smaller than the sum of its proper divisors (2044490382).

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

1143265266 is a wasteful number, since it uses less digits than its factorization.

1143265266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958 (or 2949 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1143265266 is about 33812.2058730276. The cubic root of 1143265266 is about 1045.6403562835.

Adding to 1143265266 its reverse (6625623411), we get a palindrome (7768888677).

The spelling of 1143265266 in words is "one billion, one hundred forty-three million, two hundred sixty-five thousand, two hundred sixty-six".