1323139 has 2 divisors, whose sum is σ = 1323140. Its totient is φ = 1323138.

The previous prime is 1323137. The next prime is 1323143. The reversal of 1323139 is 9313231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323139 - 2¹ = 1323137 is a prime.

Together with 1323137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1323131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661569 + 661570.

It is an arithmetic number, because the mean of its divisors is an integer number (661570).

2^1323139 is an apocalyptic number.

1323139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323139 is an equidigital number, since it uses as much as digits as its factorization.

1323139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 22.

The square root of 1323139 is about 1150.2777925354. The cubic root of 1323139 is about 109.7830157881.

The spelling of 1323139 in words is "one million, three hundred twenty-three thousand, one hundred thirty-nine".