12921700 has 72 divisors (see below), whose sum is σ = 32435424. Its totient is φ = 4416000.

The previous prime is 12921679. The next prime is 12921763. The reversal of 12921700 is 712921.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18355 + ... + 19045.

It is an arithmetic number, because the mean of its divisors is an integer number (450492).

Almost surely, 2^12921700 is an apocalyptic number.

12921700 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 12921700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16217712).

12921700 is an abundant number, since it is smaller than the sum of its proper divisors (19513724).

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

12921700 is a wasteful number, since it uses less digits than its factorization.

12921700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 12921700 is about 3594.6766196697. The cubic root of 12921700 is about 234.6604421487.

It can be divided in two parts, 1292 and 1700, that added together give a palindrome (2992).

The spelling of 12921700 in words is "twelve million, nine hundred twenty-one thousand, seven hundred".