12320500 has 48 divisors (see below), whose sum is σ = 27610128. Its totient is φ = 4800000.

The previous prime is 12320491. The next prime is 12320507. The reversal of 12320500 is 502321.

It can be written as a sum of positive squares in 8 ways, for example, as 5116644 + 7203856 = 2262^2 + 2684^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20200 + ... + 20800.

It is an arithmetic number, because the mean of its divisors is an integer number (575211).

Almost surely, 2^12320500 is an apocalyptic number.

12320500 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 12320500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13805064).

12320500 is an abundant number, since it is smaller than the sum of its proper divisors (15289628).

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

12320500 is a wasteful number, since it uses less digits than its factorization.

12320500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 12320500 is about 3510.0569795945. The cubic root of 12320500 is about 230.9631944759.

Adding to 12320500 its reverse (502321), we get a palindrome (12822821).

The spelling of 12320500 in words is "twelve million, three hundred twenty thousand, five hundred".