642948 has 24 divisors (see below), whose sum is σ = 1515360. Its totient is φ = 212160.

The previous prime is 642947. The next prime is 642953. The reversal of 642948 is 849246.

642948 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642948.

It is not an unprimeable number, because it can be changed into a prime (642947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1368 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (63140).

2⁶⁴²⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

642948 is an abundant number, since it is smaller than the sum of its proper divisors (872412).

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

642948 is a wasteful number, since it uses less digits than its factorization.

642948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 642948 is about 801.8403831187. The cubic root of 642948 is about 86.3095031532.

The spelling of 642948 in words is "six hundred forty-two thousand, nine hundred forty-eight".