25305425 has 6 divisors (see below), whose sum is σ = 31378758. Its totient is φ = 20244320.

The previous prime is 25305421. The next prime is 25305443. The reversal of 25305425 is 52450352.

It can be written as a sum of positive squares in 3 ways, for example, as 1957201 + 23348224 = 1399^2 + 4832^2 .

It is not a de Polignac number, because 25305425 - 2² = 25305421 is a prime.

It is a super-4 number, since 4×25305425⁴ (a number of 31 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25305394 and 25305403.

It is not an unprimeable number, because it can be changed into a prime (25305421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506084 + ... + 506133.

It is an arithmetic number, because the mean of its divisors is an integer number (5229793).

Almost surely, 2^25305425 is an apocalyptic number.

25305425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25305425 is a deficient number, since it is larger than the sum of its proper divisors (6073333).

25305425 is a wasteful number, since it uses less digits than its factorization.

25305425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012227 (or 1012222 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 25305425 is about 5030.4497810832. The cubic root of 25305425 is about 293.5877147968.

Adding to 25305425 its reverse (52450352), we get a palindrome (77755777).

The spelling of 25305425 in words is "twenty-five million, three hundred five thousand, four hundred twenty-five".