642803 has 8 divisors (see below), whose sum is σ = 739680. Its totient is φ = 547200.

The previous prime is 642799. The next prime is 642809. The reversal of 642803 is 308246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642803 - 2² = 642799 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642803.

It is not an unprimeable number, because it can be changed into a prime (642809) 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 7 ways as a sum of consecutive naturals, for example, 1403 + ... + 1803.

It is an arithmetic number, because the mean of its divisors is an integer number (92460).

2⁶⁴²⁸⁰³ is an apocalyptic number.

642803 is a deficient number, since it is larger than the sum of its proper divisors (96877).

642803 is a wasteful number, since it uses less digits than its factorization.

642803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 642803 is about 801.7499610228. The cubic root of 642803 is about 86.3030143865.

The spelling of 642803 in words is "six hundred forty-two thousand, eight hundred three".