1281078849 has 8 divisors (see below), whose sum is σ = 1725017472. Its totient is φ = 845596400.

The previous prime is 1281078823. The next prime is 1281078881. The reversal of 1281078849 is 9488701821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1281078849 - 2⁸ = 1281078593 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1281078798 and 1281078807.

It is not an unprimeable number, because it can be changed into a prime (1281078949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2113689 + ... + 2114294.

It is an arithmetic number, because the mean of its divisors is an integer number (215627184).

Almost surely, 2^1281078849 is an apocalyptic number.

It is an amenable number.

1281078849 is a deficient number, since it is larger than the sum of its proper divisors (443938623).

1281078849 is a wasteful number, since it uses less digits than its factorization.

1281078849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228087.

The product of its (nonzero) digits is 258048, while the sum is 48.

The square root of 1281078849 is about 35792.1618374750. The cubic root of 1281078849 is about 1086.0720075097.

The spelling of 1281078849 in words is "one billion, two hundred eighty-one million, seventy-eight thousand, eight hundred forty-nine".