1288429915 has 12 divisors (see below), whose sum is σ = 1642415616. Its totient is φ = 970110848.

The previous prime is 1288429913. The next prime is 1288429921. The reversal of 1288429915 is 5199248821.

It is not a de Polignac number, because 1288429915 - 2¹ = 1288429913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288429913) 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 11 ways as a sum of consecutive naturals, for example, 444379 + ... + 447268.

It is an arithmetic number, because the mean of its divisors is an integer number (136867968).

Almost surely, 2^1288429915 is an apocalyptic number.

1288429915 is a deficient number, since it is larger than the sum of its proper divisors (353985701).

1288429915 is an equidigital number, since it uses as much as digits as its factorization.

1288429915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891686 (or 891669 counting only the distinct ones).

The product of its digits is 414720, while the sum is 49.

The square root of 1288429915 is about 35894.7059466992. The cubic root of 1288429915 is about 1088.1454069983.

The spelling of 1288429915 in words is "one billion, two hundred eighty-eight million, four hundred twenty-nine thousand, nine hundred fifteen".