1309129 has 2 divisors, whose sum is σ = 1309130. Its totient is φ = 1309128.

The previous prime is 1309127. The next prime is 1309163. The reversal of 1309129 is 9219031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 227529 = 1040^2 + 477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1309129 - 2¹ = 1309127 is a prime.

Together with 1309127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1309123) 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, 654564 + 654565.

It is an arithmetic number, because the mean of its divisors is an integer number (654565).

2^1309129 is an apocalyptic number.

It is an amenable number.

1309129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309129 is an equidigital number, since it uses as much as digits as its factorization.

1309129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1309129 is about 1144.1717528413. The cubic root of 1309129 is about 109.3941625201.

It can be divided in two parts, 1309 and 129, that multiplied together give a palindrome (168861).

The spelling of 1309129 in words is "one million, three hundred nine thousand, one hundred twenty-nine".