648874 has 4 divisors (see below), whose sum is σ = 973314. Its totient is φ = 324436.

The previous prime is 648871. The next prime is 648887. The reversal of 648874 is 478846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478846 = 2 ⋅239423.

It can be written as a sum of positive squares in only one way, i.e., 354025 + 294849 = 595^2 + 543^2 .

It is not an unprimeable number, because it can be changed into a prime (648871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162217 + ... + 162220.

2⁶⁴⁸⁸⁷⁴ is an apocalyptic number.

648874 is a deficient number, since it is larger than the sum of its proper divisors (324440).

648874 is a wasteful number, since it uses less digits than its factorization.

648874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324439.

The product of its digits is 43008, while the sum is 37.

The square root of 648874 is about 805.5271565875. The cubic root of 648874 is about 86.5738618675.

The spelling of 648874 in words is "six hundred forty-eight thousand, eight hundred seventy-four".