1347742129 has 2 divisors, whose sum is σ = 1347742130. Its totient is φ = 1347742128.

The previous prime is 1347742111. The next prime is 1347742157. The reversal of 1347742129 is 9212477431.

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., 1200483904 + 147258225 = 34648^2 + 12135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1347742129 - 2²¹ = 1345644977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1347742091 and 1347742100.

It is not a weakly prime, because it can be changed into another prime (1347742159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673871064 + 673871065.

It is an arithmetic number, because the mean of its divisors is an integer number (673871065).

Almost surely, 2^1347742129 is an apocalyptic number.

It is an amenable number.

1347742129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1347742129 is an equidigital number, since it uses as much as digits as its factorization.

1347742129 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 1347742129 is about 36711.6075512909. The cubic root of 1347742129 is about 1104.5929525912.

The spelling of 1347742129 in words is "one billion, three hundred forty-seven million, seven hundred forty-two thousand, one hundred twenty-nine".