642700 has 18 divisors (see below), whose sum is σ = 1394876. Its totient is φ = 257040.

The previous prime is 642683. The next prime is 642701. The reversal of 642700 is 7246.

642700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (642701) by changing a digit.

642700 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 5 ways as a sum of consecutive naturals, for example, 3114 + ... + 3313.

2⁶⁴²⁷⁰⁰ is an apocalyptic number.

It is an amenable number.

642700 is an abundant number, since it is smaller than the sum of its proper divisors (752176).

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

642700 is a wasteful number, since it uses less digits than its factorization.

642700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6441 (or 6434 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 642700 is about 801.6857239592. The cubic root of 642700 is about 86.2984045317.

Adding to 642700 its reverse (7246), we get a palindrome (649946).

The spelling of 642700 in words is "six hundred forty-two thousand, seven hundred".