646242 has 32 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 201600.

The previous prime is 646237. The next prime is 646253. The reversal of 646242 is 242646.

646242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646242.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9067 + ... + 9137.

It is an arithmetic number, because the mean of its divisors is an integer number (43092).

2⁶⁴⁶²⁴² is an apocalyptic number.

646242 is an abundant number, since it is smaller than the sum of its proper divisors (732702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646242 is a wasteful number, since it uses less digits than its factorization.

646242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154.

The product of its digits is 2304, while the sum is 24.

The square root of 646242 is about 803.8917837620. The cubic root of 646242 is about 86.4566479502.

Adding to 646242 its reverse (242646), we get a palindrome (888888).

It can be divided in two parts, 646 and 242, that added together give a palindrome (888).

The spelling of 646242 in words is "six hundred forty-six thousand, two hundred forty-two".