126239 has 4 divisors (see below), whose sum is σ = 129360. Its totient is φ = 123120.

The previous prime is 126233. The next prime is 126241. The reversal of 126239 is 932621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932621 = 47 ⋅19843.

It is a cyclic number.

It is not a de Polignac number, because 126239 - 2⁴ = 126223 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126233) 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, 1499 + ... + 1580.

It is an arithmetic number, because the mean of its divisors is an integer number (32340).

2¹²⁶²³⁹ is an apocalyptic number.

126239 is a deficient number, since it is larger than the sum of its proper divisors (3121).

126239 is an equidigital number, since it uses as much as digits as its factorization.

126239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120.

The product of its digits is 648, while the sum is 23.

The square root of 126239 is about 355.3012806056. The cubic root of 126239 is about 50.1646571651.

The spelling of 126239 in words is "one hundred twenty-six thousand, two hundred thirty-nine".