1642339 has 2 divisors, whose sum is σ = 1642340. Its totient is φ = 1642338.

The previous prime is 1642327. The next prime is 1642363. The reversal of 1642339 is 9332461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1642339 - 2⁷ = 1642211 is a prime.

It is not a weakly prime, because it can be changed into another prime (1642309) 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, 821169 + 821170.

It is an arithmetic number, because the mean of its divisors is an integer number (821170).

2^1642339 is an apocalyptic number.

1642339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642339 is an equidigital number, since it uses as much as digits as its factorization.

1642339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 1642339 is about 1281.5377481760. The cubic root of 1642339 is about 117.9834076067.

The spelling of 1642339 in words is "one million, six hundred forty-two thousand, three hundred thirty-nine".