102020205 has 64 divisors (see below), whose sum is σ = 193536000. Its totient is φ = 45864000.

The previous prime is 102020189. The next prime is 102020227. The reversal of 102020205 is 502020201.

It is not a de Polignac number, because 102020205 - 2⁴ = 102020189 is a prime.

It is a congruent 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 63 ways as a sum of consecutive naturals, for example, 406330 + ... + 406580.

It is an arithmetic number, because the mean of its divisors is an integer number (3024000).

Almost surely, 2^102020205 is an apocalyptic number.

102020205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102020205 is a deficient number, since it is larger than the sum of its proper divisors (91515795).

102020205 is an equidigital number, since it uses as much as digits as its factorization.

102020205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 102020205 is about 10100.5051853855. The cubic root of 102020205 is about 467.2637219104.

Adding to 102020205 its reverse (502020201), we get a palindrome (604040406).

The spelling of 102020205 in words is "one hundred two million, twenty thousand, two hundred five".