642416 has 10 divisors (see below), whose sum is σ = 1244712. Its totient is φ = 321200.

The previous prime is 642407. The next prime is 642419. The reversal of 642416 is 614246.

It is a happy number.

642416 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 = 642391 and 642400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642419) by changing a digit.

642416 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060 + ... + 20091.

2⁶⁴²⁴¹⁶ is an apocalyptic number.

It is an amenable number.

642416 is a deficient number, since it is larger than the sum of its proper divisors (602296).

642416 is a wasteful number, since it uses less digits than its factorization.

642416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40159 (or 40153 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 642416 is about 801.5085776210. The cubic root of 642416 is about 86.2856913126.

The spelling of 642416 in words is "six hundred forty-two thousand, four hundred sixteen".