648642 has 8 divisors (see below), whose sum is σ = 1297296. Its totient is φ = 216212.

The previous prime is 648631. The next prime is 648649. The reversal of 648642 is 246846.

648642 is nontrivially palindromic in base 15.

648642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

648642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (648649) by changing a digit.

648642 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 3 ways as a sum of consecutive naturals, for example, 54048 + ... + 54059.

It is an arithmetic number, because the mean of its divisors is an integer number (162162).

2⁶⁴⁸⁶⁴² is an apocalyptic number.

648642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

648642 is a wasteful number, since it uses less digits than its factorization.

648642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108112.

The product of its digits is 9216, while the sum is 30.

The square root of 648642 is about 805.3831386365. The cubic root of 648642 is about 86.5635426940.

The spelling of 648642 in words is "six hundred forty-eight thousand, six hundred forty-two".