1020123003 has 4 divisors (see below), whose sum is σ = 1360164008. Its totient is φ = 680082000.

The previous prime is 1020123001. The next prime is 1020123017. The reversal of 1020123003 is 3003210201.

It is a happy number.

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

It is not a de Polignac number, because 1020123003 - 2¹ = 1020123001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020123003.

It is not an unprimeable number, because it can be changed into a prime (1020123001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170020498 + ... + 170020503.

It is an arithmetic number, because the mean of its divisors is an integer number (340041002).

Almost surely, 2^1020123003 is an apocalyptic number.

1020123003 is a deficient number, since it is larger than the sum of its proper divisors (340041005).

1020123003 is an equidigital number, since it uses as much as digits as its factorization.

1020123003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340041004.

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

The square root of 1020123003 is about 31939.3644739528. The cubic root of 1020123003 is about 1006.6631712060.

Adding to 1020123003 its reverse (3003210201), we get a palindrome (4023333204).

The spelling of 1020123003 in words is "one billion, twenty million, one hundred twenty-three thousand, three".