12421025 has 6 divisors (see below), whose sum is σ = 15402102. Its totient is φ = 9936800.

The previous prime is 12421021. The next prime is 12421037. The reversal of 12421025 is 52012421.

It can be written as a sum of positive squares in 3 ways, for example, as 3888784 + 8532241 = 1972^2 + 2921^2 .

It is not a de Polignac number, because 12421025 - 2² = 12421021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12420994 and 12421012.

It is not an unprimeable number, because it can be changed into a prime (12421021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 248396 + ... + 248445.

It is an arithmetic number, because the mean of its divisors is an integer number (2567017).

Almost surely, 2^12421025 is an apocalyptic number.

It is an amenable number.

12421025 is a deficient number, since it is larger than the sum of its proper divisors (2981077).

12421025 is an equidigital number, since it uses as much as digits as its factorization.

12421025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496851 (or 496846 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12421025 is about 3524.3474573316. The cubic root of 12421025 is about 231.5896494211.

Adding to 12421025 its reverse (52012421), we get a palindrome (64433446).

The spelling of 12421025 in words is "twelve million, four hundred twenty-one thousand, twenty-five".