1341247729 has 2 divisors, whose sum is σ = 1341247730. Its totient is φ = 1341247728.

The previous prime is 1341247727. The next prime is 1341247757. The reversal of 1341247729 is 9277421431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1341244129 + 3600 = 36623^2 + 60^2 .

It is an emirp because it is prime and its reverse (9277421431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1341247729 - 2¹ = 1341247727 is a prime.

Together with 1341247727, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1341247691 and 1341247700.

It is not a weakly prime, because it can be changed into another prime (1341247727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670623864 + 670623865.

It is an arithmetic number, because the mean of its divisors is an integer number (670623865).

Almost surely, 2^1341247729 is an apocalyptic number.

It is an amenable number.

1341247729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1341247729 is an equidigital number, since it uses as much as digits as its factorization.

1341247729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 1341247729 is about 36623.0491494086. The cubic root of 1341247729 is about 1102.8158514899.

The spelling of 1341247729 in words is "one billion, three hundred forty-one million, two hundred forty-seven thousand, seven hundred twenty-nine".