102239 has 4 divisors (see below), whose sum is σ = 107640. Its totient is φ = 96840.

The previous prime is 102233. The next prime is 102241. The reversal of 102239 is 932201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932201 = 31 ⋅30071.

It is a cyclic number.

It is not a de Polignac number, because 102239 - 2¹² = 98143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102233) 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, 2672 + ... + 2709.

It is an arithmetic number, because the mean of its divisors is an integer number (26910).

2¹⁰²²³⁹ is an apocalyptic number.

102239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

102239 is a deficient number, since it is larger than the sum of its proper divisors (5401).

102239 is an equidigital number, since it uses as much as digits as its factorization.

102239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 102239 is about 319.7483385414. The cubic root of 102239 is about 46.7597518429.

The spelling of 102239 in words is "one hundred two thousand, two hundred thirty-nine".