642026003 has 4 divisors (see below), whose sum is σ = 644829840. Its totient is φ = 639222168.

The previous prime is 642025997. The next prime is 642026039. The reversal of 642026003 is 300620246.

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

It is a cyclic number.

It is not a de Polignac number, because 642026003 - 2¹² = 642021907 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 642026003.

It is not an unprimeable number, because it can be changed into a prime (642026303) 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 3 ways as a sum of consecutive naturals, for example, 1401575 + ... + 1402032.

It is an arithmetic number, because the mean of its divisors is an integer number (161207460).

Almost surely, 2^642026003 is an apocalyptic number.

642026003 is a deficient number, since it is larger than the sum of its proper divisors (2803837).

642026003 is a wasteful number, since it uses less digits than its factorization.

642026003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803836.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 642026003 is about 25338.2320417191. The cubic root of 642026003 is about 862.6822704611.

Adding to 642026003 its reverse (300620246), we get a palindrome (942646249).

It can be divided in two parts, 6420 and 26003, that added together give a palindrome (32423).

The spelling of 642026003 in words is "six hundred forty-two million, twenty-six thousand, three".