1299439 has 2 divisors, whose sum is σ = 1299440. Its totient is φ = 1299438.

The previous prime is 1299437. The next prime is 1299449. The reversal of 1299439 is 9349921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1299439 - 2¹ = 1299437 is a prime.

Together with 1299437, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1299398 and 1299407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649719 + 649720.

It is an arithmetic number, because the mean of its divisors is an integer number (649720).

2^1299439 is an apocalyptic number.

1299439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299439 is an equidigital number, since it uses as much as digits as its factorization.

1299439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 37.

The square root of 1299439 is about 1139.9293837778. The cubic root of 1299439 is about 109.1235867804.

The spelling of 1299439 in words is "one million, two hundred ninety-nine thousand, four hundred thirty-nine".