1020503 has 8 divisors (see below), whose sum is σ = 1124496. Its totient is φ = 918400.

The previous prime is 1020491. The next prime is 1020517. The reversal of 1020503 is 3050201.

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 1020503 - 2⁸ = 1020247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020583) 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, 833 + ... + 1653.

It is an arithmetic number, because the mean of its divisors is an integer number (140562).

2^1020503 is an apocalyptic number.

1020503 is a deficient number, since it is larger than the sum of its proper divisors (103993).

1020503 is a wasteful number, since it uses less digits than its factorization.

1020503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 1020503 is about 1010.1994852503. The cubic root of 1020503 is about 100.6788150088.

Adding to 1020503 its reverse (3050201), we get a palindrome (4070704).

The spelling of 1020503 in words is "one million, twenty thousand, five hundred three".