646042 has 8 divisors (see below), whose sum is σ = 974016. Its totient is φ = 321372.

The previous prime is 646039. The next prime is 646067. The reversal of 646042 is 240646.

646042 is nontrivially palindromic in base 7.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258 + ... + 1165.

It is an arithmetic number, because the mean of its divisors is an integer number (121752).

2⁶⁴⁶⁰⁴² is an apocalyptic number.

646042 is a deficient number, since it is larger than the sum of its proper divisors (327974).

646042 is a wasteful number, since it uses less digits than its factorization.

646042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 646042 is about 803.7673792833. The cubic root of 646042 is about 86.4477281165.

Adding to 646042 its reverse (240646), we get a palindrome (886688).

The spelling of 646042 in words is "six hundred forty-six thousand, forty-two".