642562 has 8 divisors (see below), whose sum is σ = 973692. Its totient is φ = 318000.

The previous prime is 642557. The next prime is 642563. The reversal of 642562 is 265246.

It can be written as a sum of positive squares in 2 ways, for example, as 641601 + 961 = 801^2 + 31^2 .

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

It is not an unprimeable number, because it can be changed into a prime (642563) by changing a digit.

642562 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 in 3 ways as a sum of consecutive naturals, for example, 1389 + ... + 1792.

2⁶⁴²⁵⁶² is an apocalyptic number.

642562 is a deficient number, since it is larger than the sum of its proper divisors (331130).

642562 is a wasteful number, since it uses less digits than its factorization.

642562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284.

The product of its digits is 2880, while the sum is 25.

The square root of 642562 is about 801.5996506985. The cubic root of 642562 is about 86.2922274495.

The spelling of 642562 in words is "six hundred forty-two thousand, five hundred sixty-two".