102730161 has 8 divisors (see below), whose sum is σ = 139219264. Its totient is φ = 67363920.

The previous prime is 102730157. The next prime is 102730163. The reversal of 102730161 is 161037201.

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

It is not a de Polignac number, because 102730161 - 2² = 102730157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102730163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280501 + ... + 280866.

It is an arithmetic number, because the mean of its divisors is an integer number (17402408).

Almost surely, 2^102730161 is an apocalyptic number.

It is an amenable number.

102730161 is a deficient number, since it is larger than the sum of its proper divisors (36489103).

102730161 is an equidigital number, since it uses as much as digits as its factorization.

102730161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561431.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 102730161 is about 10135.5888334127. The cubic root of 102730161 is about 468.3451094275.

Adding to 102730161 its reverse (161037201), we get a palindrome (263767362).

The spelling of 102730161 in words is "one hundred two million, seven hundred thirty thousand, one hundred sixty-one".