1287421160 has 16 divisors (see below), whose sum is σ = 2896697700. Its totient is φ = 514968448.

The previous prime is 1287421153. The next prime is 1287421181. The reversal of 1287421160 is 611247821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1281496804 + 5924356 = 35798^2 + 2434^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16092725 + ... + 16092804.

Almost surely, 2^1287421160 is an apocalyptic number.

1287421160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287421160 is an abundant number, since it is smaller than the sum of its proper divisors (1609276540).

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

1287421160 is a wasteful number, since it uses less digits than its factorization.

1287421160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32185540 (or 32185536 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1287421160 is about 35880.6516105825. The cubic root of 1287421160 is about 1087.8613510064.

Adding to 1287421160 its reverse (611247821), we get a palindrome (1898668981).

The spelling of 1287421160 in words is "one billion, two hundred eighty-seven million, four hundred twenty-one thousand, one hundred sixty".