642200 has 72 divisors (see below), whose sum is σ = 1701900. Its totient is φ = 224640.

The previous prime is 642199. The next prime is 642211. The reversal of 642200 is 2246.

642200 = T₅₅ + T₅₆ + ... + T₁₅₈.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33791 + ... + 33809.

2⁶⁴²²⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850950).

642200 is an abundant number, since it is smaller than the sum of its proper divisors (1059700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642200 is a wasteful number, since it uses less digits than its factorization.

642200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 642200 is about 801.3738203860. The cubic root of 642200 is about 86.2760195949.

Adding to 642200 its reverse (2246), we get a palindrome (644446).

The spelling of 642200 in words is "six hundred forty-two thousand, two hundred".