642682 has 4 divisors (see below), whose sum is σ = 964026. Its totient is φ = 321340.

The previous prime is 642673. The next prime is 642683. The reversal of 642682 is 286246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 269361 = 611^2 + 519^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 642682.

It is not an unprimeable number, because it can be changed into a prime (642683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160669 + ... + 160672.

2⁶⁴²⁶⁸² is an apocalyptic number.

642682 is a deficient number, since it is larger than the sum of its proper divisors (321344).

642682 is a wasteful number, since it uses less digits than its factorization.

642682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321343.

The product of its digits is 4608, while the sum is 28.

The square root of 642682 is about 801.6744975363. The cubic root of 642682 is about 86.2975988755.

The spelling of 642682 in words is "six hundred forty-two thousand, six hundred eighty-two".