1241321729 has 2 divisors, whose sum is σ = 1241321730. Its totient is φ = 1241321728.

The previous prime is 1241321723. The next prime is 1241321761. The reversal of 1241321729 is 9271231421.

It is an a-pointer prime, because the next prime (1241321761) can be obtained adding 1241321729 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1106227600 + 135094129 = 33260^2 + 11623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241321729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1241321695 and 1241321704.

It is not a weakly prime, because it can be changed into another prime (1241321723) 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 as a sum of consecutive naturals, namely, 620660864 + 620660865.

It is an arithmetic number, because the mean of its divisors is an integer number (620660865).

Almost surely, 2^1241321729 is an apocalyptic number.

It is an amenable number.

1241321729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241321729 is an equidigital number, since it uses as much as digits as its factorization.

1241321729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 1241321729 is about 35232.3960155991. The cubic root of 1241321729 is about 1074.7186511600.

The spelling of 1241321729 in words is "one billion, two hundred forty-one million, three hundred twenty-one thousand, seven hundred twenty-nine".