123534 has 12 divisors (see below), whose sum is σ = 267696. Its totient is φ = 41172.

The previous prime is 123527. The next prime is 123547. The reversal of 123534 is 435321.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 6863 = 123534 / (1 + 2 + 3 + 5 + 3 + 4).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

123534 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3414 + ... + 3449.

It is an arithmetic number, because the mean of its divisors is an integer number (22308).

2¹²³⁵³⁴ is an apocalyptic number.

123534 is an abundant number, since it is smaller than the sum of its proper divisors (144162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123534 is a wasteful number, since it uses less digits than its factorization.

123534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6871 (or 6868 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 123534 is about 351.4740388706. The cubic root of 123534 is about 49.8037641709.

Adding to 123534 its reverse (435321), we get a palindrome (558855).

The spelling of 123534 in words is "one hundred twenty-three thousand, five hundred thirty-four".