381239 has 2 divisors, whose sum is σ = 381240. Its totient is φ = 381238.

The previous prime is 381233. The next prime is 381253. The reversal of 381239 is 932183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381239 - 2⁴ = 381223 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381233) 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, 190619 + 190620.

It is an arithmetic number, because the mean of its divisors is an integer number (190620).

2³⁸¹²³⁹ is an apocalyptic number.

381239 is a deficient number, since it is larger than the sum of its proper divisors (1).

381239 is an equidigital number, since it uses as much as digits as its factorization.

381239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 381239 is about 617.4455441575. The cubic root of 381239 is about 72.5102007050.

The spelling of 381239 in words is "three hundred eighty-one thousand, two hundred thirty-nine".