123958 has 4 divisors (see below), whose sum is σ = 185940. Its totient is φ = 61978.

The previous prime is 123953. The next prime is 123973. The reversal of 123958 is 859321.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30988 + ... + 30991.

It is an arithmetic number, because the mean of its divisors is an integer number (46485).

2¹²³⁹⁵⁸ is an apocalyptic number.

123958 is a deficient number, since it is larger than the sum of its proper divisors (61982).

123958 is an equidigital number, since it uses as much as digits as its factorization.

123958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61981.

The product of its digits is 2160, while the sum is 28.

The square root of 123958 is about 352.0766961899. The cubic root of 123958 is about 49.8606788194.

It can be divided in two parts, 12395 and 8, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 123958 in words is "one hundred twenty-three thousand, nine hundred fifty-eight".