12722500 has 60 divisors (see below), whose sum is σ = 31839808. Its totient is φ = 4356000.

The previous prime is 12722497. The next prime is 12722509. The reversal of 12722500 is 522721.

It is not an unprimeable number, because it can be changed into a prime (12722509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17137 + ... + 17863.

Almost surely, 2^12722500 is an apocalyptic number.

12722500 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 12722500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15919904).

12722500 is an abundant number, since it is smaller than the sum of its proper divisors (19117308).

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

12722500 is an equidigital number, since it uses as much as digits as its factorization.

12722500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 12722500 is about 3566.8613654024. The cubic root of 12722500 is about 233.4483559882.

The spelling of 12722500 in words is "twelve million, seven hundred twenty-two thousand, five hundred".