25645424 has 40 divisors (see below), whose sum is σ = 57957600. Its totient is φ = 10988544.

The previous prime is 25645397. The next prime is 25645427. The reversal of 25645424 is 42454652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25645427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3152 + ... + 7824.

It is an arithmetic number, because the mean of its divisors is an integer number (1448940).

Almost surely, 2^25645424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25645424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28978800).

25645424 is an abundant number, since it is smaller than the sum of its proper divisors (32312176).

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

25645424 is an equidigital number, since it uses as much as digits as its factorization.

25645424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702 (or 4682 counting only the distinct ones).

The product of its digits is 38400, while the sum is 32.

The square root of 25645424 is about 5064.1311199455. The cubic root of 25645424 is about 294.8967329825.

The spelling of 25645424 in words is "twenty-five million, six hundred forty-five thousand, four hundred twenty-four".