102165545 has 16 divisors (see below), whose sum is σ = 127277568. Its totient is φ = 78671040.

The previous prime is 102165523. The next prime is 102165559. The reversal of 102165545 is 545561201.

It is a happy number.

It is not a de Polignac number, because 102165545 - 2¹⁰ = 102164521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10772 + ... + 17898.

It is an arithmetic number, because the mean of its divisors is an integer number (7954848).

Almost surely, 2^102165545 is an apocalyptic number.

It is an amenable number.

102165545 is a deficient number, since it is larger than the sum of its proper divisors (25112023).

102165545 is an equidigital number, since it uses as much as digits as its factorization.

102165545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7240.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 102165545 is about 10107.6973144233. The cubic root of 102165545 is about 467.4855076675.

It can be divided in two parts, 1021 and 65545, that added together give a palindrome (66566).

The spelling of 102165545 in words is "one hundred two million, one hundred sixty-five thousand, five hundred forty-five".