102147205 has 8 divisors (see below), whose sum is σ = 122630904. Its totient is φ = 81681600.

The previous prime is 102147197. The next prime is 102147233. The reversal of 102147205 is 502741201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18369796 + 83777409 = 4286^2 + 9153^2 .

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

It is not a de Polignac number, because 102147205 - 2³ = 102147197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19795 + ... + 24415.

It is an arithmetic number, because the mean of its divisors is an integer number (15328863).

Almost surely, 2^102147205 is an apocalyptic number.

It is an amenable number.

102147205 is a deficient number, since it is larger than the sum of its proper divisors (20483699).

102147205 is an equidigital number, since it uses as much as digits as its factorization.

102147205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9047.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 102147205 is about 10106.7900443217. The cubic root of 102147205 is about 467.4575328178.

Adding to 102147205 its reverse (502741201), we get a palindrome (604888406).

The spelling of 102147205 in words is "one hundred two million, one hundred forty-seven thousand, two hundred five".