1281051912 has 32 divisors (see below), whose sum is σ = 3660148800. Its totient is φ = 366014784.

The previous prime is 1281051899. The next prime is 1281051943. The reversal of 1281051912 is 2191501821.

It is a self number, because there is not a number n which added to its sum of digits gives 1281051912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3812487 + ... + 3812822.

It is an arithmetic number, because the mean of its divisors is an integer number (114379650).

Almost surely, 2^1281051912 is an apocalyptic number.

1281051912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1281051912 is an abundant number, since it is smaller than the sum of its proper divisors (2379096888).

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

1281051912 is a wasteful number, since it uses less digits than its factorization.

1281051912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7625325 (or 7625321 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1281051912 is about 35791.7855380253. The cubic root of 1281051912 is about 1086.0643952468.

The spelling of 1281051912 in words is "one billion, two hundred eighty-one million, fifty-one thousand, nine hundred twelve".