642016 has 12 divisors (see below), whose sum is σ = 1264032. Its totient is φ = 320992.

The previous prime is 642013. The next prime is 642049. The reversal of 642016 is 610246.

642016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 641984 and 642002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000 + ... + 10063.

It is an arithmetic number, because the mean of its divisors is an integer number (105336).

2⁶⁴²⁰¹⁶ is an apocalyptic number.

It is an amenable number.

642016 is a deficient number, since it is larger than the sum of its proper divisors (622016).

642016 is a wasteful number, since it uses less digits than its factorization.

642016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20073 (or 20065 counting only the distinct ones).

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

The square root of 642016 is about 801.2590093097. The cubic root of 642016 is about 86.2677790136.

It can be divided in two parts, 64 and 2016, that added together give a triangular number (2080 = T₆₄).

The spelling of 642016 in words is "six hundred forty-two thousand, sixteen".