1291262875 has 16 divisors (see below), whose sum is σ = 1841711040. Its totient is φ = 885436800.

The previous prime is 1291262873. The next prime is 1291262893. The reversal of 1291262875 is 5782621921.

It is not a de Polignac number, because 1291262875 - 2¹ = 1291262873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1291262873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 736990 + ... + 738739.

It is an arithmetic number, because the mean of its divisors is an integer number (115106940).

Almost surely, 2^1291262875 is an apocalyptic number.

1291262875 is a deficient number, since it is larger than the sum of its proper divisors (550448165).

1291262875 is an equidigital number, since it uses as much as digits as its factorization.

1291262875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475751 (or 1475741 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 1291262875 is about 35934.1463652610. The cubic root of 1291262875 is about 1088.9423500504.

The spelling of 1291262875 in words is "one billion, two hundred ninety-one million, two hundred sixty-two thousand, eight hundred seventy-five".