1321078008 has 32 divisors (see below), whose sum is σ = 3304224000. Its totient is φ = 440155488.

The previous prime is 1321077971. The next prime is 1321078013. The reversal of 1321078008 is 8008701231.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 45643 + ... + 68741.

It is an arithmetic number, because the mean of its divisors is an integer number (103257000).

Almost surely, 2^1321078008 is an apocalyptic number.

It is an amenable number.

1321078008 is an abundant number, since it is smaller than the sum of its proper divisors (1983145992).

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

1321078008 is a wasteful number, since it uses less digits than its factorization.

1321078008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25491 (or 25487 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 1321078008 is about 36346.6368182807. The cubic root of 1321078008 is about 1097.2598486936.

Adding to 1321078008 its reverse (8008701231), we get a palindrome (9329779239).

The spelling of 1321078008 in words is "one billion, three hundred twenty-one million, seventy-eight thousand, eight".