12498640 has 80 divisors (see below), whose sum is σ = 36247680. Its totient is φ = 3893760.

The previous prime is 12498601. The next prime is 12498641. The reversal of 12498640 is 4689421.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 12498596 and 12498605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12498641) 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, 5146 + ... + 7174.

It is an arithmetic number, because the mean of its divisors is an integer number (453096).

Almost surely, 2^12498640 is an apocalyptic number.

12498640 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 12498640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18123840).

12498640 is an abundant number, since it is smaller than the sum of its proper divisors (23749040).

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

12498640 is a wasteful number, since it uses less digits than its factorization.

12498640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 12498640 is about 3535.3415676565. The cubic root of 12498640 is about 232.0710246276.

It can be divided in two parts, 1249 and 8640, that added together give a palindrome (9889).

The spelling of 12498640 in words is "twelve million, four hundred ninety-eight thousand, six hundred forty".