12400825 has 12 divisors (see below), whose sum is σ = 16186960. Its totient is φ = 9398160.

The previous prime is 12400793. The next prime is 12400847. The reversal of 12400825 is 52800421.

It is not a de Polignac number, because 12400825 - 2⁵ = 12400793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12400796 and 12400805.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12579 + ... + 13528.

Almost surely, 2^12400825 is an apocalyptic number.

It is an amenable number.

12400825 is a deficient number, since it is larger than the sum of its proper divisors (3786135).

12400825 is a wasteful number, since it uses less digits than its factorization.

12400825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26136 (or 26131 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 12400825 is about 3521.4805125117. The cubic root of 12400825 is about 231.4640385000.

It can be divided in two parts, 12400 and 825, that added together give a square (13225 = 115²).

The spelling of 12400825 in words is "twelve million, four hundred thousand, eight hundred twenty-five".