123345534 has 32 divisors (see below), whose sum is σ = 268168320. Its totient is φ = 37595232.

The previous prime is 123345529. The next prime is 123345571. The reversal of 123345534 is 435543321.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957 + ... + 15735.

It is an arithmetic number, because the mean of its divisors is an integer number (8380260).

Almost surely, 2^123345534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123345534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134084160).

123345534 is an abundant number, since it is smaller than the sum of its proper divisors (144822786).

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

123345534 is a wasteful number, since it uses less digits than its factorization.

123345534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14904.

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

The square root of 123345534 is about 11106.1034571086. The cubic root of 123345534 is about 497.7842406590.

Adding to 123345534 its reverse (435543321), we get a palindrome (558888855).

The spelling of 123345534 in words is "one hundred twenty-three million, three hundred forty-five thousand, five hundred thirty-four".