123538 has 8 divisors (see below), whose sum is σ = 195120. Its totient is φ = 58500.

The previous prime is 123527. The next prime is 123547. The reversal of 123538 is 835321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1588 + ... + 1663.

It is an arithmetic number, because the mean of its divisors is an integer number (24390).

123538 is a Friedman number, since it can be written as 3251*38, using all its digits and the basic arithmetic operations.

2¹²³⁵³⁸ is an apocalyptic number.

123538 is a deficient number, since it is larger than the sum of its proper divisors (71582).

123538 is a wasteful number, since it uses less digits than its factorization.

123538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272.

The product of its digits is 720, while the sum is 22.

The square root of 123538 is about 351.4797291452. The cubic root of 123538 is about 49.8043017096.

Adding to 123538 its reverse (835321), we get a palindrome (958859).

The spelling of 123538 in words is "one hundred twenty-three thousand, five hundred thirty-eight".