1281233831056 has 45 divisors (see below), whose sum is σ = 2524296751353. Its totient is φ = 629979168960.

The previous prime is 1281233831021. The next prime is 1281233831063. The reversal of 1281233831056 is 6501383321821.

The square root of 1281233831056 is 1131916.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 41663341456 + 1239570489600 = 204116^2 + 1113360^2 .

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 276185185 + ... + 276189823.

Almost surely, 2^{1281233831056} is an apocalyptic number.

1281233831056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1281233831056 is the 1131916-th square number.

It is an amenable number.

1281233831056 is a deficient number, since it is larger than the sum of its proper divisors (1243062920297).

1281233831056 is an frugal number, since it uses more digits than its factorization.

1281233831056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9408 (or 4702 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 1281233831056 in words is "one trillion, two hundred eighty-one billion, two hundred thirty-three million, eight hundred thirty-one thousand, fifty-six".