1020245 has 8 divisors (see below), whose sum is σ = 1236384. Its totient is φ = 808144.

The previous prime is 1020233. The next prime is 1020247. The reversal of 1020245 is 5420201.

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 1020245 - 2¹⁸ = 758101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020247) by changing a digit.

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, 419 + ... + 1488.

It is an arithmetic number, because the mean of its divisors is an integer number (154548).

2^1020245 is an apocalyptic number.

It is an amenable number.

1020245 is a deficient number, since it is larger than the sum of its proper divisors (216139).

1020245 is a wasteful number, since it uses less digits than its factorization.

1020245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1020245 is about 1010.0717796276. The cubic root of 1020245 is about 100.6703298717.

Adding to 1020245 its reverse (5420201), we get a palindrome (6440446).

The spelling of 1020245 in words is "one million, twenty thousand, two hundred forty-five".