25780525 has 12 divisors (see below), whose sum is σ = 32572692. Its totient is φ = 20234240.

The previous prime is 25780481. The next prime is 25780529. The reversal of 25780525 is 52508752.

It can be written as a sum of positive squares in 6 ways, for example, as 509796 + 25270729 = 714^2 + 5027^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25780525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25780529) 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 11 ways as a sum of consecutive naturals, for example, 8404 + ... + 11053.

It is an arithmetic number, because the mean of its divisors is an integer number (2714391).

Almost surely, 2^25780525 is an apocalyptic number.

25780525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25780525 is a deficient number, since it is larger than the sum of its proper divisors (6792167).

25780525 is a wasteful number, since it uses less digits than its factorization.

25780525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19520 (or 19515 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 25780525 is about 5077.4526093308. The cubic root of 25780525 is about 295.4136684348.

The spelling of 25780525 in words is "twenty-five million, seven hundred eighty thousand, five hundred twenty-five".