1278433241 has 2 divisors, whose sum is σ = 1278433242. Its totient is φ = 1278433240.

The previous prime is 1278433223. The next prime is 1278433243. The reversal of 1278433241 is 1423348721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1071907600 + 206525641 = 32740^2 + 14371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1278433241 is a prime.

Together with 1278433243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1278433243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639216620 + 639216621.

It is an arithmetic number, because the mean of its divisors is an integer number (639216621).

Almost surely, 2^1278433241 is an apocalyptic number.

It is an amenable number.

1278433241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278433241 is an equidigital number, since it uses as much as digits as its factorization.

1278433241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 1278433241 is about 35755.1848128352. The cubic root of 1278433241 is about 1085.3238617825.

The spelling of 1278433241 in words is "one billion, two hundred seventy-eight million, four hundred thirty-three thousand, two hundred forty-one".