25728125 has 12 divisors (see below), whose sum is σ = 32162004. Its totient is φ = 20580000.

The previous prime is 25728119. The next prime is 25728137. The reversal of 25728125 is 52182752.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 23951236 + 1776889 = 4894^2 + 1333^2 .

It is not a de Polignac number, because 25728125 - 2¹² = 25724029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25728091 and 25728100.

It is a congruent number.

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, 992 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (2680167).

Almost surely, 2^25728125 is an apocalyptic number.

25728125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25728125 is a deficient number, since it is larger than the sum of its proper divisors (6433879).

25728125 is an frugal number, since it uses more digits than its factorization.

25728125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258 (or 8238 counting only the distinct ones).

The product of its digits is 11200, while the sum is 32.

The square root of 25728125 is about 5072.2899167930. The cubic root of 25728125 is about 295.2133857824.

It can be divided in two parts, 257 and 28125, that added together give a palindrome (28382).

The spelling of 25728125 in words is "twenty-five million, seven hundred twenty-eight thousand, one hundred twenty-five".