1642106003 has 4 divisors (see below), whose sum is σ = 1642720728. Its totient is φ = 1641491280.

The previous prime is 1642105979. The next prime is 1642106021. The reversal of 1642106003 is 3006012461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3006012461 = 103 ⋅29184587.

It is a cyclic number.

It is not a de Polignac number, because 1642106003 - 2¹⁰ = 1642104979 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 1642106003.

It is not an unprimeable number, because it can be changed into a prime (1642106503) 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, 303338 + ... + 308703.

It is an arithmetic number, because the mean of its divisors is an integer number (410680182).

Almost surely, 2^1642106003 is an apocalyptic number.

1642106003 is a deficient number, since it is larger than the sum of its proper divisors (614725).

1642106003 is an equidigital number, since it uses as much as digits as its factorization.

1642106003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614724.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1642106003 is about 40522.9071390491. The cubic root of 1642106003 is about 1179.7782794658.

Adding to 1642106003 its reverse (3006012461), we get a palindrome (4648118464).

The spelling of 1642106003 in words is "one billion, six hundred forty-two million, one hundred six thousand, three".