642782 has 16 divisors (see below), whose sum is σ = 1125600. Its totient is φ = 275184.

The previous prime is 642779. The next prime is 642791. The reversal of 642782 is 287246.

It is a congruent number.

It is an unprimeable number.

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, 218 + ... + 1154.

It is an arithmetic number, because the mean of its divisors is an integer number (70350).

2⁶⁴²⁷⁸² is an apocalyptic number.

642782 is a deficient number, since it is larger than the sum of its proper divisors (482818).

642782 is an equidigital number, since it uses as much as digits as its factorization.

642782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 946 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 642782 is about 801.7368645634. The cubic root of 642782 is about 86.3020745531.

The spelling of 642782 in words is "six hundred forty-two thousand, seven hundred eighty-two".