1020421003 has 16 divisors (see below), whose sum is σ = 1197239296. Its totient is φ = 851497920.

The previous prime is 1020421001. The next prime is 1020421009. The reversal of 1020421003 is 3001240201.

It is not a de Polignac number, because 1020421003 - 2¹ = 1020421001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020421001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88798 + ... + 99628.

It is an arithmetic number, because the mean of its divisors is an integer number (74827456).

Almost surely, 2^1020421003 is an apocalyptic number.

1020421003 is a deficient number, since it is larger than the sum of its proper divisors (176818293).

1020421003 is a wasteful number, since it uses less digits than its factorization.

1020421003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11194.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1020421003 is about 31944.0292230019. The cubic root of 1020421003 is about 1006.7611843600.

Adding to 1020421003 its reverse (3001240201), we get a palindrome (4021661204).

The spelling of 1020421003 in words is "one billion, twenty million, four hundred twenty-one thousand, three".