102145 has 8 divisors (see below), whose sum is σ = 126720. Its totient is φ = 78960.

The previous prime is 102139. The next prime is 102149. The reversal of 102145 is 541201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-102145 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102149) 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 in 7 ways as a sum of consecutive naturals, for example, 175 + ... + 484.

It is an arithmetic number, because the mean of its divisors is an integer number (15840).

2¹⁰²¹⁴⁵ is an apocalyptic number.

It is an amenable number.

102145 is a deficient number, since it is larger than the sum of its proper divisors (24575).

102145 is an equidigital number, since it uses as much as digits as its factorization.

102145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 102145 is about 319.6013141400. The cubic root of 102145 is about 46.7454169204.

Adding to 102145 its reverse (541201), we get a palindrome (643346).

The spelling of 102145 in words is "one hundred two thousand, one hundred forty-five".