1301389 has 2 divisors, whose sum is σ = 1301390. Its totient is φ = 1301388.

The previous prime is 1301387. The next prime is 1301393. The reversal of 1301389 is 9831031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990025 + 311364 = 995^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301389 - 2¹ = 1301387 is a prime.

It is a super-2 number, since 2×1301389² = 3387226658642, which contains 22 as substring.

Together with 1301387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301387) 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, 650694 + 650695.

It is an arithmetic number, because the mean of its divisors is an integer number (650695).

2^1301389 is an apocalyptic number.

It is an amenable number.

1301389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301389 is an equidigital number, since it uses as much as digits as its factorization.

1301389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1301389 is about 1140.7843792759. The cubic root of 1301389 is about 109.1781448478.

The spelling of 1301389 in words is "one million, three hundred one thousand, three hundred eighty-nine".