12125646 has 64 divisors (see below), whose sum is σ = 30320640. Its totient is φ = 3564000.

The previous prime is 12125609. The next prime is 12125647. The reversal of 12125646 is 64652121.

12125646 is a `hidden beast` number, since 1 + 2 + 12 + 5 + 646 = 666.

12125646 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15771 + ... + 16521.

It is an arithmetic number, because the mean of its divisors is an integer number (473760).

Almost surely, 2^12125646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12125646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15160320).

12125646 is an abundant number, since it is smaller than the sum of its proper divisors (18194994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12125646 is a wasteful number, since it uses less digits than its factorization.

12125646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 792 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12125646 is about 3482.1898282546. The cubic root of 12125646 is about 229.7391245060.

Adding to 12125646 its reverse (64652121), we get a palindrome (76777767).

The spelling of 12125646 in words is "twelve million, one hundred twenty-five thousand, six hundred forty-six".