646102 has 16 divisors (see below), whose sum is σ = 1060992. Its totient is φ = 293760.

The previous prime is 646099. The next prime is 646103. The reversal of 646102 is 201646.

It is a self number, because there is not a number n which added to its sum of digits gives 646102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646103) 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, 748 + ... + 1360.

It is an arithmetic number, because the mean of its divisors is an integer number (66312).

2⁶⁴⁶¹⁰² is an apocalyptic number.

646102 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

646102 is a deficient number, since it is larger than the sum of its proper divisors (414890).

646102 is a wasteful number, since it uses less digits than its factorization.

646102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 646102 is about 803.8047026486. The cubic root of 646102 is about 86.4504042599.

Adding to 646102 its reverse (201646), we get a palindrome (847748).

The spelling of 646102 in words is "six hundred forty-six thousand, one hundred two".