648554 has 12 divisors (see below), whose sum is σ = 1018626. Its totient is φ = 309672.

The previous prime is 648509. The next prime is 648563. The reversal of 648554 is 455846.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 529 = 805^2 + 23^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 648554.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 752 + ... + 1364.

2⁶⁴⁸⁵⁵⁴ is an apocalyptic number.

648554 is a deficient number, since it is larger than the sum of its proper divisors (370072).

648554 is a wasteful number, since it uses less digits than its factorization.

648554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 638 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 648554 is about 805.3285044005. The cubic root of 648554 is about 86.5596278811.

The spelling of 648554 in words is "six hundred forty-eight thousand, five hundred fifty-four".