642848 has 12 divisors (see below), whose sum is σ = 1265670. Its totient is φ = 321408.

The previous prime is 642833. The next prime is 642853. The reversal of 642848 is 848246.

It can be written as a sum of positive squares in only one way, i.e., 620944 + 21904 = 788^2 + 148^2 .

It is a super-2 number, since 2×642848² = 826507102208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 20089 = 642848 / (6 + 4 + 2 + 8 + 4 + 8).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642848.

It is an unprimeable number.

642848 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 as a sum of consecutive naturals, namely, 10013 + ... + 10076.

2⁶⁴²⁸⁴⁸ is an apocalyptic number.

It is an amenable number.

642848 is a deficient number, since it is larger than the sum of its proper divisors (622822).

642848 is a wasteful number, since it uses less digits than its factorization.

642848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20099 (or 20091 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 642848 is about 801.7780241438. The cubic root of 642848 is about 86.3050282461.

The spelling of 642848 in words is "six hundred forty-two thousand, eight hundred forty-eight".