123434520 has 96 divisors (see below), whose sum is σ = 407075760. Its totient is φ = 29920000.

The previous prime is 123434503. The next prime is 123434551. The reversal of 123434520 is 25434321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10270 + ... + 18770.

Almost surely, 2^123434520 is an apocalyptic number.

123434520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123434520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203537880).

123434520 is an abundant number, since it is smaller than the sum of its proper divisors (283641240).

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

123434520 is a wasteful number, since it uses less digits than its factorization.

123434520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8537 (or 8522 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 123434520 is about 11110.1089103573. The cubic root of 123434520 is about 497.9039184970.

Adding to 123434520 its reverse (25434321), we get a palindrome (148868841).

The spelling of 123434520 in words is "one hundred twenty-three million, four hundred thirty-four thousand, five hundred twenty".