1345205129 has 2 divisors, whose sum is σ = 1345205130. Its totient is φ = 1345205128.

The previous prime is 1345205119. The next prime is 1345205159. The reversal of 1345205129 is 9215025431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1343369104 + 1836025 = 36652^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345205129 - 2²⁰ = 1344156553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1345205095 and 1345205104.

It is not a weakly prime, because it can be changed into another prime (1345205119) 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, 672602564 + 672602565.

It is an arithmetic number, because the mean of its divisors is an integer number (672602565).

Almost surely, 2^1345205129 is an apocalyptic number.

It is an amenable number.

1345205129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345205129 is an equidigital number, since it uses as much as digits as its factorization.

1345205129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1345205129 is about 36677.0381710410. The cubic root of 1345205129 is about 1103.8994191891.

The spelling of 1345205129 in words is "one billion, three hundred forty-five million, two hundred five thousand, one hundred twenty-nine".