1278256041 has 12 divisors (see below), whose sum is σ = 1848319668. Its totient is φ = 851270784.

The previous prime is 1278256013. The next prime is 1278256043. The reversal of 1278256041 is 1406528721.

1278256041 is a `hidden beast` number, since 1 + 27 + 8 + 25 + 604 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 408242025 + 870014016 = 20205^2 + 29496^2 .

It is not a de Polignac number, because 1278256041 - 2¹³ = 1278247849 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1278255987 and 1278256005.

It is not an unprimeable number, because it can be changed into a prime (1278256043) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 65940 + ... + 83093.

It is an arithmetic number, because the mean of its divisors is an integer number (154026639).

Almost surely, 2^1278256041 is an apocalyptic number.

It is an amenable number.

1278256041 is a deficient number, since it is larger than the sum of its proper divisors (570063627).

1278256041 is a wasteful number, since it uses less digits than its factorization.

1278256041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149992 (or 149989 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1278256041 is about 35752.7067646633. The cubic root of 1278256041 is about 1085.2737149130.

The spelling of 1278256041 in words is "one billion, two hundred seventy-eight million, two hundred fifty-six thousand, forty-one".