1291141268 has 12 divisors (see below), whose sum is σ = 2302129620. Its totient is φ = 633389952.

The previous prime is 1291141261. The next prime is 1291141303. The reversal of 1291141268 is 8621411921.

It can be written as a sum of positive squares in 2 ways, for example, as 1009841284 + 281299984 = 31778^2 + 16772^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291141261) 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 3 ways as a sum of consecutive naturals, for example, 3044933 + ... + 3045356.

It is an arithmetic number, because the mean of its divisors is an integer number (191844135).

Almost surely, 2^1291141268 is an apocalyptic number.

It is an amenable number.

1291141268 is a deficient number, since it is larger than the sum of its proper divisors (1010988352).

1291141268 is a wasteful number, since it uses less digits than its factorization.

1291141268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090346 (or 6090344 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 1291141268 is about 35932.4542440396. The cubic root of 1291141268 is about 1088.9081646101.

The spelling of 1291141268 in words is "one billion, two hundred ninety-one million, one hundred forty-one thousand, two hundred sixty-eight".