1306139 has 2 divisors, whose sum is σ = 1306140. Its totient is φ = 1306138.

The previous prime is 1306133. The next prime is 1306157. The reversal of 1306139 is 9316031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1306139 - 2¹² = 1302043 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1306133) 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, 653069 + 653070.

It is an arithmetic number, because the mean of its divisors is an integer number (653070).

2^1306139 is an apocalyptic number.

1306139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306139 is an equidigital number, since it uses as much as digits as its factorization.

1306139 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 23.

The square root of 1306139 is about 1142.8643839056. The cubic root of 1306139 is about 109.3108150217.

The spelling of 1306139 in words is "one million, three hundred six thousand, one hundred thirty-nine".