12425121 has 12 divisors (see below), whose sum is σ = 18126420. Its totient is φ = 8200800.

The previous prime is 12425117. The next prime is 12425131. The reversal of 12425121 is 12152421.

It can be written as a sum of positive squares in 2 ways, for example, as 10890000 + 1535121 = 3300^2 + 1239^2 .

It is not a de Polignac number, because 12425121 - 2² = 12425117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12425094 and 12425103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12425131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5926 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (1510535).

Almost surely, 2^12425121 is an apocalyptic number.

It is an amenable number.

12425121 is a deficient number, since it is larger than the sum of its proper divisors (5701299).

12425121 is a wasteful number, since it uses less digits than its factorization.

12425121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13776 (or 13773 counting only the distinct ones).

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

The square root of 12425121 is about 3524.9285099134. The cubic root of 12425121 is about 231.6151032237.

Adding to 12425121 its reverse (12152421), we get a palindrome (24577542).

The spelling of 12425121 in words is "twelve million, four hundred twenty-five thousand, one hundred twenty-one".