1422439 has 2 divisors, whose sum is σ = 1422440. Its totient is φ = 1422438.

The previous prime is 1422437. The next prime is 1422461. The reversal of 1422439 is 9342241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1422439 - 2¹ = 1422437 is a prime.

Together with 1422437, it forms a pair of twin primes.

1422439 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1422433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711219 + 711220.

It is an arithmetic number, because the mean of its divisors is an integer number (711220).

2^1422439 is an apocalyptic number.

1422439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1422439 is an equidigital number, since it uses as much as digits as its factorization.

1422439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 1422439 is about 1192.6604713832. The cubic root of 1422439 is about 112.4634020872.

The spelling of 1422439 in words is "one million, four hundred twenty-two thousand, four hundred thirty-nine".