25500425 has 24 divisors (see below), whose sum is σ = 34651800. Its totient is φ = 18529280.

The previous prime is 25500421. The next prime is 25500439. The reversal of 25500425 is 52400552.

It can be written as a sum of positive squares in 12 ways, for example, as 7284601 + 18215824 = 2699^2 + 4268^2 .

It is not a de Polignac number, because 25500425 - 2² = 25500421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25500425.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11291 + ... + 13359.

It is an arithmetic number, because the mean of its divisors is an integer number (1443825).

Almost surely, 2^25500425 is an apocalyptic number.

25500425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25500425 is a deficient number, since it is larger than the sum of its proper divisors (9151375).

25500425 is a wasteful number, since it uses less digits than its factorization.

25500425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125 (or 2120 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 25500425 is about 5049.7945502763. The cubic root of 25500425 is about 294.3399010477.

Adding to 25500425 its reverse (52400552), we get a palindrome (77900977).

The spelling of 25500425 in words is "twenty-five million, five hundred thousand, four hundred twenty-five".