1288696131 has 6 divisors (see below), whose sum is σ = 1861449980. Its totient is φ = 859130748.

The previous prime is 1288696127. The next prime is 1288696151. The reversal of 1288696131 is 1316968821.

1288696131 is a `hidden beast` number, since 1 + 28 + 8 + 6 + 9 + 613 + 1 = 666.

It is not a de Polignac number, because 1288696131 - 2² = 1288696127 is a prime.

It is a super-2 number, since 2×1288696131² = 3321475436108738322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288696121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71594221 + ... + 71594238.

Almost surely, 2^1288696131 is an apocalyptic number.

1288696131 is a deficient number, since it is larger than the sum of its proper divisors (572753849).

1288696131 is a wasteful number, since it uses less digits than its factorization.

1288696131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143188465 (or 143188462 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1288696131 is about 35898.4140457486. The cubic root of 1288696131 is about 1088.2203462106.

The spelling of 1288696131 in words is "one billion, two hundred eighty-eight million, six hundred ninety-six thousand, one hundred thirty-one".