123543534 has 16 divisors (see below), whose sum is σ = 257830272. Its totient is φ = 39390648.

The previous prime is 123543533. The next prime is 123543547. The reversal of 123543534 is 435345321.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123543533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447484 + ... + 447759.

It is an arithmetic number, because the mean of its divisors is an integer number (16114392).

Almost surely, 2^123543534 is an apocalyptic number.

123543534 is an abundant number, since it is smaller than the sum of its proper divisors (134286738).

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

123543534 is a wasteful number, since it uses less digits than its factorization.

123543534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895271.

The product of its digits is 21600, while the sum is 30.

The square root of 123543534 is about 11115.0139001263. The cubic root of 123543534 is about 498.0504537518.

Adding to 123543534 its reverse (435345321), we get a palindrome (558888855).

The spelling of 123543534 in words is "one hundred twenty-three million, five hundred forty-three thousand, five hundred thirty-four".