123321534 has 64 divisors (see below), whose sum is σ = 297062400. Its totient is φ = 34080480.

The previous prime is 123321511. The next prime is 123321551. The reversal of 123321534 is 435123321.

It is a super-2 number, since 2×123321534² = 30416401496226312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62832 + ... + 64764.

It is an arithmetic number, because the mean of its divisors is an integer number (4641600).

Almost surely, 2^123321534 is an apocalyptic number.

123321534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123321534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148531200).

123321534 is an abundant number, since it is smaller than the sum of its proper divisors (173740866).

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

123321534 is a wasteful number, since it uses less digits than its factorization.

123321534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990 (or 1976 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 123321534 is about 11105.0229175810. The cubic root of 123321534 is about 497.7519530511.

Adding to 123321534 its reverse (435123321), we get a palindrome (558444855).

The spelling of 123321534 in words is "one hundred twenty-three million, three hundred twenty-one thousand, five hundred thirty-four".