102566 has 4 divisors (see below), whose sum is σ = 153852. Its totient is φ = 51282.

The previous prime is 102563. The next prime is 102587. The reversal of 102566 is 665201.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25640 + ... + 25643.

It is an arithmetic number, because the mean of its divisors is an integer number (38463).

2¹⁰²⁵⁶⁶ is an apocalyptic number.

102566 is a deficient number, since it is larger than the sum of its proper divisors (51286).

102566 is an equidigital number, since it uses as much as digits as its factorization.

102566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51285.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 102566 is about 320.2592699673. The cubic root of 102566 is about 46.8095507330.

Adding to 102566 its reverse (665201), we get a palindrome (767767).

The spelling of 102566 in words is "one hundred two thousand, five hundred sixty-six".