642276 has 48 divisors (see below), whose sum is σ = 1758400. Its totient is φ = 202176.

The previous prime is 642253. The next prime is 642281. The reversal of 642276 is 672246.

642276 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

642276 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 15 ways as a sum of consecutive naturals, for example, 1896 + ... + 2208.

2⁶⁴²²⁷⁶ 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 642276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879200).

642276 is an abundant number, since it is smaller than the sum of its proper divisors (1116124).

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

642276 is a wasteful number, since it uses less digits than its factorization.

642276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 337 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 642276 is about 801.4212375524. The cubic root of 642276 is about 86.2794228540.

The spelling of 642276 in words is "six hundred forty-two thousand, two hundred seventy-six".