12345000 has 80 divisors (see below), whose sum is σ = 38612640. Its totient is φ = 3288000.

The previous prime is 12344989. The next prime is 12345001. The reversal of 12345000 is 54321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (12345001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14589 + ... + 15411.

It is an arithmetic number, because the mean of its divisors is an integer number (482658).

Almost surely, 2^12345000 is an apocalyptic number.

12345000 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 12345000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19306320).

12345000 is an abundant number, since it is smaller than the sum of its proper divisors (26267640).

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

12345000 is an equidigital number, since it uses as much as digits as its factorization.

12345000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 12345000 is about 3513.5452181522. The cubic root of 12345000 is about 231.1161874981.

Adding to 12345000 its reverse (54321), we get a palindrome (12399321).

The spelling of 12345000 in words is "twelve million, three hundred forty-five thousand".