25513925 has 6 divisors (see below), whose sum is σ = 31637298. Its totient is φ = 20411120.

The previous prime is 25513871. The next prime is 25513927. The reversal of 25513925 is 52931552.

It can be written as a sum of positive squares in 3 ways, for example, as 4592449 + 20921476 = 2143^2 + 4574^2 .

It is not a de Polignac number, because 25513925 - 2⁶ = 25513861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25513891 and 25513900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25513927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510254 + ... + 510303.

It is an arithmetic number, because the mean of its divisors is an integer number (5272883).

Almost surely, 2^25513925 is an apocalyptic number.

25513925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25513925 is a deficient number, since it is larger than the sum of its proper divisors (6123373).

25513925 is a wasteful number, since it uses less digits than its factorization.

25513925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020567 (or 1020562 counting only the distinct ones).

The product of its digits is 13500, while the sum is 32.

The square root of 25513925 is about 5051.1310614554. The cubic root of 25513925 is about 294.3918333542.

The spelling of 25513925 in words is "twenty-five million, five hundred thirteen thousand, nine hundred twenty-five".