12425640 has 64 divisors (see below), whose sum is σ = 39476160. Its totient is φ = 3118080.

The previous prime is 12425629. The next prime is 12425641. The reversal of 12425640 is 4652421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12425640.

It is not an unprimeable number, because it can be changed into a prime (12425641) 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 15 ways as a sum of consecutive naturals, for example, 1006 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (616815).

Almost surely, 2^12425640 is an apocalyptic number.

12425640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12425640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19738080).

12425640 is an abundant number, since it is smaller than the sum of its proper divisors (27050520).

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

12425640 is a wasteful number, since it uses less digits than its factorization.

12425640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6122 (or 6118 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 12425640 is about 3525.0021276589. The cubic root of 12425640 is about 231.6183280498.

The spelling of 12425640 in words is "twelve million, four hundred twenty-five thousand, six hundred forty".