12421125 has 48 divisors (see below), whose sum is σ = 22883952. Its totient is φ = 6480000.

The previous prime is 12421121. The next prime is 12421163. The reversal of 12421125 is 52112421.

It can be written as a sum of positive squares in 8 ways, for example, as 11168964 + 1252161 = 3342^2 + 1119^2 .

It is not a de Polignac number, because 12421125 - 2² = 12421121 is a prime.

It is a zygodrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12421098 and 12421107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68535 + ... + 68715.

It is an arithmetic number, because the mean of its divisors is an integer number (476749).

Almost surely, 2^12421125 is an apocalyptic number.

12421125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12421125 is a deficient number, since it is larger than the sum of its proper divisors (10462827).

12421125 is a wasteful number, since it uses less digits than its factorization.

12421125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 250 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12421125 is about 3524.3616443265. The cubic root of 12421125 is about 231.5902709185.

Adding to 12421125 its reverse (52112421), we get a palindrome (64533546).

The spelling of 12421125 in words is "twelve million, four hundred twenty-one thousand, one hundred twenty-five".