1304239 has 2 divisors, whose sum is σ = 1304240. Its totient is φ = 1304238.

The previous prime is 1304231. The next prime is 1304243. The reversal of 1304239 is 9324031.

It is a strong prime.

It is an emirp because it is prime and its reverse (9324031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1304239 - 2³ = 1304231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652119 + 652120.

It is an arithmetic number, because the mean of its divisors is an integer number (652120).

2^1304239 is an apocalyptic number.

1304239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304239 is an equidigital number, since it uses as much as digits as its factorization.

1304239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1304239 is about 1142.0328366558. The cubic root of 1304239 is about 109.2577856129.

The spelling of 1304239 in words is "one million, three hundred four thousand, two hundred thirty-nine".