1287485304 has 128 divisors (see below), whose sum is σ = 3817082880. Its totient is φ = 354124800.

The previous prime is 1287485299. The next prime is 1287485377. The reversal of 1287485304 is 4035847821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1212934 + ... + 1213994.

It is an arithmetic number, because the mean of its divisors is an integer number (29820960).

Almost surely, 2^1287485304 is an apocalyptic number.

1287485304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287485304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908541440).

1287485304 is an abundant number, since it is smaller than the sum of its proper divisors (2529597576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287485304 is a wasteful number, since it uses less digits than its factorization.

1287485304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 1287485304 is about 35881.5454516664. The cubic root of 1287485304 is about 1087.8794177747.

It can be divided in two parts, 1287 and 485304, that added together give a triangular number (486591 = T₉₈₆).

The spelling of 1287485304 in words is "one billion, two hundred eighty-seven million, four hundred eighty-five thousand, three hundred four".