1427399 has 2 divisors, whose sum is σ = 1427400. Its totient is φ = 1427398.

The previous prime is 1427389. The next prime is 1427401. The reversal of 1427399 is 9937241.

It is a strong prime.

It is an emirp because it is prime and its reverse (9937241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1427399 - 2⁴ = 1427383 is a prime.

It is a Sophie Germain prime.

Together with 1427401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427329) 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, 713699 + 713700.

It is an arithmetic number, because the mean of its divisors is an integer number (713700).

2^1427399 is an apocalyptic number.

1427399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427399 is an equidigital number, since it uses as much as digits as its factorization.

1427399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 1427399 is about 1194.7380466027. The cubic root of 1427399 is about 112.5939692240.

The spelling of 1427399 in words is "one million, four hundred twenty-seven thousand, three hundred ninety-nine".