636271 has 4 divisors (see below), whose sum is σ = 651112. Its totient is φ = 621432.

The previous prime is 636263. The next prime is 636277. The reversal of 636271 is 172636.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 636271 - 2³ = 636263 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636277) 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 3 ways as a sum of consecutive naturals, for example, 7356 + ... + 7441.

It is an arithmetic number, because the mean of its divisors is an integer number (162778).

2⁶³⁶²⁷¹ is an apocalyptic number.

636271 is a deficient number, since it is larger than the sum of its proper divisors (14841).

636271 is a wasteful number, since it uses less digits than its factorization.

636271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840.

The product of its digits is 1512, while the sum is 25.

The square root of 636271 is about 797.6659701905. The cubic root of 636271 is about 86.0096888309.

The spelling of 636271 in words is "six hundred thirty-six thousand, two hundred seventy-one".