6543025 has 6 divisors (see below), whose sum is σ = 8113382. Its totient is φ = 5234400.

The previous prime is 6543007. The next prime is 6543029. The reversal of 6543025 is 5203456.

It can be written as a sum of positive squares in 3 ways, for example, as 76176 + 6466849 = 276^2 + 2543^2 .

It is not a de Polignac number, because 6543025 - 2⁵ = 6542993 is a prime.

It is a super-2 number, since 2×6543025² = 85622352301250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 261721 = 6543025 / (6 + 5 + 4 + 3 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6543029) 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, 130836 + ... + 130885.

Almost surely, 2^6543025 is an apocalyptic number.

It is an amenable number.

6543025 is a deficient number, since it is larger than the sum of its proper divisors (1570357).

6543025 is a wasteful number, since it uses less digits than its factorization.

6543025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261731 (or 261726 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 6543025 is about 2557.9337364365. The cubic root of 6543025 is about 187.0364251730.

The spelling of 6543025 in words is "six million, five hundred forty-three thousand, twenty-five".