642716 has 12 divisors (see below), whose sum is σ = 1152480. Its totient is φ = 313440.

The previous prime is 642701. The next prime is 642737. The reversal of 642716 is 617246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (96040).

2⁶⁴²⁷¹⁶ is an apocalyptic number.

It is an amenable number.

642716 is a deficient number, since it is larger than the sum of its proper divisors (509764).

642716 is a wasteful number, since it uses less digits than its factorization.

642716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964 (or 3962 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 642716 is about 801.6957028699. The cubic root of 642716 is about 86.2991206580.

The spelling of 642716 in words is "six hundred forty-two thousand, seven hundred sixteen".