648043 has 4 divisors (see below), whose sum is σ = 706968. Its totient is φ = 589120.

The previous prime is 648041. The next prime is 648047. The reversal of 648043 is 340846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 648043 - 2¹ = 648041 is a prime.

It is a Duffinian number.

648043 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 647999 and 648017.

It is not an unprimeable number, because it can be changed into a prime (648041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29446 + ... + 29467.

It is an arithmetic number, because the mean of its divisors is an integer number (176742).

2⁶⁴⁸⁰⁴³ is an apocalyptic number.

648043 is a deficient number, since it is larger than the sum of its proper divisors (58925).

648043 is a wasteful number, since it uses less digits than its factorization.

648043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58924.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 648043 is about 805.0111800466. The cubic root of 648043 is about 86.5368882728.

Adding to 648043 its reverse (340846), we get a palindrome (988889).

The spelling of 648043 in words is "six hundred forty-eight thousand, forty-three".