123039 has 30 divisors (see below), whose sum is σ = 220704. Its totient is φ = 68040.

The previous prime is 123031. The next prime is 123049. The reversal of 123039 is 930321.

It is not a de Polignac number, because 123039 - 2³ = 123031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3954 + ... + 3984.

2¹²³⁰³⁹ is an apocalyptic number.

123039 is a deficient number, since it is larger than the sum of its proper divisors (97665).

123039 is an equidigital number, since it uses as much as digits as its factorization.

123039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 123039 is about 350.7691548583. The cubic root of 123039 is about 49.7371539941.

Adding to 123039 its product of nonzero digits (162), we get a square (123201 = 351²).

The spelling of 123039 in words is "one hundred twenty-three thousand, thirty-nine".