102720165 has 16 divisors (see below), whose sum is σ = 164619648. Its totient is φ = 54694976.

The previous prime is 102720133. The next prime is 102720181. The reversal of 102720165 is 561027201.

It is a cyclic number.

It is not a de Polignac number, because 102720165 - 2⁵ = 102720133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4552 + ... + 15038.

It is an arithmetic number, because the mean of its divisors is an integer number (10288728).

Almost surely, 2^102720165 is an apocalyptic number.

102720165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102720165 is a deficient number, since it is larger than the sum of its proper divisors (61899483).

102720165 is a wasteful number, since it uses less digits than its factorization.

102720165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11148.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 102720165 is about 10135.0957074909. The cubic root of 102720165 is about 468.3299184018.

Adding to 102720165 its reverse (561027201), we get a palindrome (663747366).

The spelling of 102720165 in words is "one hundred two million, seven hundred twenty thousand, one hundred sixty-five".