1308239 has 4 divisors (see below), whose sum is σ = 1321824. Its totient is φ = 1294656.

The previous prime is 1308221. The next prime is 1308247. The reversal of 1308239 is 9328031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9328031 = 19 ⋅490949.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1308239 is a prime.

It is a super-3 number, since 3×1308239³ = 6717111076933367757, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6647 + ... + 6840.

It is an arithmetic number, because the mean of its divisors is an integer number (330456).

2^1308239 is an apocalyptic number.

1308239 is a deficient number, since it is larger than the sum of its proper divisors (13585).

1308239 is an equidigital number, since it uses as much as digits as its factorization.

1308239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13584.

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

The square root of 1308239 is about 1143.7827590937. The cubic root of 1308239 is about 109.3693666758.

The spelling of 1308239 in words is "one million, three hundred eight thousand, two hundred thirty-nine".