25021525 has 6 divisors (see below), whose sum is σ = 31026722. Its totient is φ = 20017200.

The previous prime is 25021511. The next prime is 25021541. The reversal of 25021525 is 52512052.

It can be written as a sum of positive squares in 3 ways, for example, as 1521 + 25020004 = 39^2 + 5002^2 .

It is not a de Polignac number, because 25021525 - 2⁷ = 25021397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25021496 and 25021505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500406 + ... + 500455.

Almost surely, 2^25021525 is an apocalyptic number.

25021525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25021525 is a deficient number, since it is larger than the sum of its proper divisors (6005197).

25021525 is a wasteful number, since it uses less digits than its factorization.

25021525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000871 (or 1000866 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 25021525 is about 5002.1520368737. The cubic root of 25021525 is about 292.4856690570.

Adding to 25021525 its reverse (52512052), we get a palindrome (77533577).

The spelling of 25021525 in words is "twenty-five million, twenty-one thousand, five hundred twenty-five".