1020603 has 4 divisors (see below), whose sum is σ = 1360808. Its totient is φ = 680400.

The previous prime is 1020599. The next prime is 1020619. The reversal of 1020603 is 3060201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1020603 - 2² = 1020599 is a prime.

It is a D-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 (1020683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 170098 + ... + 170103.

It is an arithmetic number, because the mean of its divisors is an integer number (340202).

2^1020603 is an apocalyptic number.

1020603 is a deficient number, since it is larger than the sum of its proper divisors (340205).

1020603 is an equidigital number, since it uses as much as digits as its factorization.

1020603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340204.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1020603 is about 1010.2489792126. The cubic root of 1020603 is about 100.6821034370.

Adding to 1020603 its reverse (3060201), we get a palindrome (4080804).

The spelling of 1020603 in words is "one million, twenty thousand, six hundred three".