648674 has 16 divisors (see below), whose sum is σ = 1067640. Its totient is φ = 293760.

The previous prime is 648671. The next prime is 648677. The reversal of 648674 is 476846.

It is an interprime number because it is at equal distance from previous prime (648671) and next prime (648677).

It can be written as a sum of positive squares in 4 ways, for example, as 413449 + 235225 = 643^2 + 485^2 .

It is an Ulam number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648674.

It is not an unprimeable number, because it can be changed into a prime (648671) 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 in 7 ways as a sum of consecutive naturals, for example, 1382 + ... + 1790.

2⁶⁴⁸⁶⁷⁴ is an apocalyptic number.

648674 is a deficient number, since it is larger than the sum of its proper divisors (418966).

648674 is a wasteful number, since it uses less digits than its factorization.

648674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485.

The product of its digits is 32256, while the sum is 35.

The square root of 648674 is about 805.4030047125. The cubic root of 648674 is about 86.5649661746.

The spelling of 648674 in words is "six hundred forty-eight thousand, six hundred seventy-four".