12821700 has 72 divisors (see below), whose sum is σ = 37636480. Its totient is φ = 3369600.

The previous prime is 12821687. The next prime is 12821701. The reversal of 12821700 is 712821.

It is not an unprimeable number, because it can be changed into a prime (12821701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23430 + ... + 23970.

Almost surely, 2^12821700 is an apocalyptic number.

12821700 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 12821700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18818240).

12821700 is an abundant number, since it is smaller than the sum of its proper divisors (24814780).

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

12821700 is a wasteful number, since it uses less digits than its factorization.

12821700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 12821700 is about 3580.7401469529. The cubic root of 12821700 is about 234.0535343948.

The spelling of 12821700 in words is "twelve million, eight hundred twenty-one thousand, seven hundred".