12721125 has 16 divisors (see below), whose sum is σ = 21168576. Its totient is φ = 6784400.

The previous prime is 12721103. The next prime is 12721147. The reversal of 12721125 is 52112721.

12721125 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12721103) and next prime (12721147).

It is not a de Polignac number, because 12721125 - 2⁷ = 12720997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16587 + ... + 17336.

It is an arithmetic number, because the mean of its divisors is an integer number (1323036).

Almost surely, 2^12721125 is an apocalyptic number.

12721125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12721125 is a deficient number, since it is larger than the sum of its proper divisors (8447451).

12721125 is an equidigital number, since it uses as much as digits as its factorization.

12721125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33941 (or 33931 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 12721125 is about 3566.6686137066. The cubic root of 12721125 is about 233.4399456115.

Adding to 12721125 its reverse (52112721), we get a palindrome (64833846).

The spelling of 12721125 in words is "twelve million, seven hundred twenty-one thousand, one hundred twenty-five".