25645312 has 72 divisors (see below), whose sum is σ = 63870912. Its totient is φ = 9984000.

The previous prime is 25645303. The next prime is 25645331. The reversal of 25645312 is 21354652.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19062 + ... + 20362.

It is an arithmetic number, because the mean of its divisors is an integer number (887096).

Almost surely, 2^25645312 is an apocalyptic number.

25645312 is a gapful number since it is divisible by the number (22) 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 25645312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31935456).

25645312 is an abundant number, since it is smaller than the sum of its proper divisors (38225600).

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

25645312 is a wasteful number, since it uses less digits than its factorization.

25645312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335 (or 1321 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 25645312 is about 5064.1200617679. The cubic root of 25645312 is about 294.8963036858.

Adding to 25645312 its reverse (21354652), we get a palindrome (46999964).

The spelling of 25645312 in words is "twenty-five million, six hundred forty-five thousand, three hundred twelve".