25803025 has 24 divisors (see below), whose sum is σ = 34250040. Its totient is φ = 19215360.

The previous prime is 25802999. The next prime is 25803049. The reversal of 25803025 is 52030852.

It can be written as a sum of positive squares in 12 ways, for example, as 6548481 + 19254544 = 2559^2 + 4388^2 .

It is not a de Polignac number, because 25803025 - 2⁵ = 25802993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 46047 + ... + 46603.

It is an arithmetic number, because the mean of its divisors is an integer number (1427085).

Almost surely, 2^25803025 is an apocalyptic number.

25803025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25803025 is a deficient number, since it is larger than the sum of its proper divisors (8447015).

25803025 is a wasteful number, since it uses less digits than its factorization.

25803025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25803025 is about 5079.6678040990. The cubic root of 25803025 is about 295.4995843837.

Adding to 25803025 its reverse (52030852), we get a palindrome (77833877).

The spelling of 25803025 in words is "twenty-five million, eight hundred three thousand, twenty-five".