642284 has 12 divisors (see below), whose sum is σ = 1130808. Its totient is φ = 319200.

The previous prime is 642281. The next prime is 642359. The reversal of 642284 is 482246.

It is not an unprimeable number, because it can be changed into a prime (642281) 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, 464 + ... + 1224.

It is an arithmetic number, because the mean of its divisors is an integer number (94234).

2⁶⁴²²⁸⁴ is an apocalyptic number.

It is an amenable number.

642284 is a deficient number, since it is larger than the sum of its proper divisors (488524).

642284 is a wasteful number, since it uses less digits than its factorization.

642284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 974 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 642284 is about 801.4262286699. The cubic root of 642284 is about 86.2797810761.

The spelling of 642284 in words is "six hundred forty-two thousand, two hundred eighty-four".