12400425 has 24 divisors (see below), whose sum is σ = 22781280. Its totient is φ = 6613200.

The previous prime is 12400397. The next prime is 12400441. The reversal of 12400425 is 52400421.

12400425 is a `hidden beast` number, since 1 + 240 + 0 + 425 = 666.

It is not a de Polignac number, because 12400425 - 2⁸ = 12400169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12400398 and 12400407.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8511 + ... + 9860.

It is an arithmetic number, because the mean of its divisors is an integer number (949220).

Almost surely, 2^12400425 is an apocalyptic number.

12400425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12400425 is a deficient number, since it is larger than the sum of its proper divisors (10380855).

12400425 is a wasteful number, since it uses less digits than its factorization.

12400425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18390 (or 18379 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12400425 is about 3521.4237177596. The cubic root of 12400425 is about 231.4615497782.

Adding to 12400425 its reverse (52400421), we get a palindrome (64800846).

The spelling of 12400425 in words is "twelve million, four hundred thousand, four hundred twenty-five".