1278251041 has 2 divisors, whose sum is σ = 1278251042. Its totient is φ = 1278251040.

The previous prime is 1278251003. The next prime is 1278251069. The reversal of 1278251041 is 1401528721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841232016 + 437019025 = 29004^2 + 20905^2 .

It is an emirp because it is prime and its reverse (1401528721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1278251041 - 2¹⁵ = 1278218273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1278250994 and 1278251012.

It is not a weakly prime, because it can be changed into another prime (1278251071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639125520 + 639125521.

It is an arithmetic number, because the mean of its divisors is an integer number (639125521).

Almost surely, 2^1278251041 is an apocalyptic number.

It is an amenable number.

1278251041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278251041 is an equidigital number, since it uses as much as digits as its factorization.

1278251041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1278251041 is about 35752.6368398192. The cubic root of 1278251041 is about 1085.2722998664.

Adding to 1278251041 its reverse (1401528721), we get a palindrome (2679779762).

The spelling of 1278251041 in words is "one billion, two hundred seventy-eight million, two hundred fifty-one thousand, forty-one".