1020205 has 8 divisors (see below), whose sum is σ = 1288800. Its totient is φ = 773136.

The previous prime is 1020163. The next prime is 1020223. The reversal of 1020205 is 5020201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020205 - 2⁷ = 1020077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020191 and 1020200.

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, 5275 + ... + 5464.

It is an arithmetic number, because the mean of its divisors is an integer number (161100).

2^1020205 is an apocalyptic number.

It is an amenable number.

1020205 is a deficient number, since it is larger than the sum of its proper divisors (268595).

1020205 is a wasteful number, since it uses less digits than its factorization.

1020205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10763.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 1020205 is about 1010.0519788605. The cubic root of 1020205 is about 100.6690142185.

Adding to 1020205 its reverse (5020201), we get a palindrome (6040406).

It can be divided in two parts, 1020 and 205, that added together give a triangular number (1225 = T₄₉).

The spelling of 1020205 in words is "one million, twenty thousand, two hundred five".