1402439 has 2 divisors, whose sum is σ = 1402440. Its totient is φ = 1402438.

The previous prime is 1402421. The next prime is 1402459. The reversal of 1402439 is 9342041.

It is a weak prime.

It is an emirp because it is prime and its reverse (9342041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1402439 is a prime.

It is a Chen prime.

1402439 is a modest number, since divided by 2439 gives 14 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1402459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701219 + 701220.

It is an arithmetic number, because the mean of its divisors is an integer number (701220).

2^1402439 is an apocalyptic number.

1402439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402439 is an equidigital number, since it uses as much as digits as its factorization.

1402439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1402439 is about 1184.2461737325. The cubic root of 1402439 is about 111.9338203842.

The spelling of 1402439 in words is "one million, four hundred two thousand, four hundred thirty-nine".