1288622131 has 2 divisors, whose sum is σ = 1288622132. Its totient is φ = 1288622130.

The previous prime is 1288622129. The next prime is 1288622141. The reversal of 1288622131 is 1312268821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1288622131 - 2¹ = 1288622129 is a prime.

It is a super-2 number, since 2×1288622131² = 3321093993005962322, which contains 22 as substring.

Together with 1288622129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1288622141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644311065 + 644311066.

It is an arithmetic number, because the mean of its divisors is an integer number (644311066).

Almost surely, 2^1288622131 is an apocalyptic number.

1288622131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288622131 is an equidigital number, since it uses as much as digits as its factorization.

1288622131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 1288622131 is about 35897.3833447509. The cubic root of 1288622131 is about 1088.1995164108.

The spelling of 1288622131 in words is "one billion, two hundred eighty-eight million, six hundred twenty-two thousand, one hundred thirty-one".