6520025 has 12 divisors (see below), whose sum is σ = 8283324. Its totient is φ = 5088000.

The previous prime is 6519991. The next prime is 6520057. The reversal of 6520025 is 5200256.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1819801 + 4700224 = 1349^2 + 2168^2 .

It is not a de Polignac number, because 6520025 - 2¹⁶ = 6454489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6519979 and 6520006.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2156 + ... + 4205.

It is an arithmetic number, because the mean of its divisors is an integer number (690277).

Almost surely, 2^6520025 is an apocalyptic number.

It is an amenable number.

6520025 is a deficient number, since it is larger than the sum of its proper divisors (1763299).

6520025 is a wasteful number, since it uses less digits than its factorization.

6520025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412 (or 6407 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 6520025 is about 2553.4339623339. The cubic root of 6520025 is about 186.8170114592.

The spelling of 6520025 in words is "six million, five hundred twenty thousand, twenty-five".