52645 has 4 divisors (see below), whose sum is σ = 63180. Its totient is φ = 42112.

The previous prime is 52639. The next prime is 52667. The reversal of 52645 is 54625.

52645 = 68² + 69² + ... + 77².

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

It can be written as a sum of positive squares in 2 ways, for example, as 31329 + 21316 = 177^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 52645 - 2⁷ = 52517 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5260 + ... + 5269.

It is an arithmetic number, because the mean of its divisors is an integer number (15795).

2⁵²⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

52645 is a deficient number, since it is larger than the sum of its proper divisors (10535).

52645 is a wasteful number, since it uses less digits than its factorization.

52645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10534.

The product of its digits is 1200, while the sum is 22.

The square root of 52645 is about 229.4449825121. Note that the first 3 decimals coincide. The cubic root of 52645 is about 37.4788028352.

It can be divided in two parts, 5 and 2645, that multiplied together give a square (13225 = 115²).

The spelling of 52645 in words is "fifty-two thousand, six hundred forty-five".