1288957531 has 2 divisors, whose sum is σ = 1288957532. Its totient is φ = 1288957530.

The previous prime is 1288957517. The next prime is 1288957583. The reversal of 1288957531 is 1357598821.

It is a weak prime.

It is an emirp because it is prime and its reverse (1357598821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1288957531 - 2⁵ = 1288957499 is a prime.

It is a super-2 number, since 2×1288957531² = 3322823033443231922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1288957031) 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 as a sum of consecutive naturals, namely, 644478765 + 644478766.

It is an arithmetic number, because the mean of its divisors is an integer number (644478766).

Almost surely, 2^1288957531 is an apocalyptic number.

1288957531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288957531 is an equidigital number, since it uses as much as digits as its factorization.

1288957531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 49.

The square root of 1288957531 is about 35902.0546905048. The cubic root of 1288957531 is about 1088.2939196880.

The spelling of 1288957531 in words is "one billion, two hundred eighty-eight million, nine hundred fifty-seven thousand, five hundred thirty-one".