1300391 has 2 divisors, whose sum is σ = 1300392. Its totient is φ = 1300390.

The previous prime is 1300367. The next prime is 1300421. The reversal of 1300391 is 1930031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1300391 - 2¹⁰ = 1299367 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1302391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650195 + 650196.

It is an arithmetic number, because the mean of its divisors is an integer number (650196).

2^1300391 is an apocalyptic number.

1300391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300391 is an equidigital number, since it uses as much as digits as its factorization.

1300391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 1300391 is about 1140.3468770510. The cubic root of 1300391 is about 109.1502291226.

The spelling of 1300391 in words is "one million, three hundred thousand, three hundred ninety-one".