1281219041 has 2 divisors, whose sum is σ = 1281219042. Its totient is φ = 1281219040.

The previous prime is 1281219029. The next prime is 1281219061. The reversal of 1281219041 is 1409121821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877048225 + 404170816 = 29615^2 + 20104^2 .

It is an emirp because it is prime and its reverse (1409121821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1281219041 - 2⁶ = 1281218977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1281218995 and 1281219013.

It is not a weakly prime, because it can be changed into another prime (1281219061) 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, 640609520 + 640609521.

It is an arithmetic number, because the mean of its divisors is an integer number (640609521).

Almost surely, 2^1281219041 is an apocalyptic number.

It is an amenable number.

1281219041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281219041 is an equidigital number, since it uses as much as digits as its factorization.

1281219041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1281219041 is about 35794.1202015080. The cubic root of 1281219041 is about 1086.1116233520. Note that the first 3 decimals are identical.

The spelling of 1281219041 in words is "one billion, two hundred eighty-one million, two hundred nineteen thousand, forty-one".