1281573968 has 30 divisors (see below), whose sum is σ = 2637712686. Its totient is φ = 603091456.

The previous prime is 1281573929. The next prime is 1281573977. The reversal of 1281573968 is 8693751821.

It can be written as a sum of positive squares in 3 ways, for example, as 484528144 + 797045824 = 22012^2 + 28232^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133955 + ... + 143202.

Almost surely, 2^1281573968 is an apocalyptic number.

It is an amenable number.

1281573968 is an abundant number, since it is smaller than the sum of its proper divisors (1356138718).

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

1281573968 is a wasteful number, since it uses less digits than its factorization.

1281573968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277199 (or 277176 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 1281573968 is about 35799.0777534841. The cubic root of 1281573968 is about 1086.2119066855.

The spelling of 1281573968 in words is "one billion, two hundred eighty-one million, five hundred seventy-three thousand, nine hundred sixty-eight".