636025 has 24 divisors (see below), whose sum is σ = 902720. Its totient is φ = 440640.

The previous prime is 636023. The next prime is 636043. The reversal of 636025 is 520636.

It is not a de Polignac number, because 636025 - 2¹ = 636023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 635987 and 636005.

It is not an unprimeable number, because it can be changed into a prime (636023) by changing a digit.

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, 6124 + ... + 6226.

2⁶³⁶⁰²⁵ is an apocalyptic number.

636025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

636025 is a deficient number, since it is larger than the sum of its proper divisors (266695).

636025 is a wasteful number, since it uses less digits than its factorization.

636025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 636025 is about 797.5117553993. The cubic root of 636025 is about 85.9986028257.

The spelling of 636025 in words is "six hundred thirty-six thousand, twenty-five".