1648563 has 16 divisors (see below), whose sum is σ = 2599680. Its totient is φ = 909216.

The previous prime is 1648553. The next prime is 1648567. The reversal of 1648563 is 3658461.

It is not a de Polignac number, because 1648563 - 2⁵ = 1648531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1648567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 745 + ... + 1962.

It is an arithmetic number, because the mean of its divisors is an integer number (162480).

2^1648563 is an apocalyptic number.

1648563 is a deficient number, since it is larger than the sum of its proper divisors (951117).

1648563 is a wasteful number, since it uses less digits than its factorization.

1648563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746.

The product of its digits is 17280, while the sum is 33.

The square root of 1648563 is about 1283.9637845360. The cubic root of 1648563 is about 118.1322609685.

It can be divided in two parts, 1648 and 563, that added together give a triangular number (2211 = T₆₆).

The spelling of 1648563 in words is "one million, six hundred forty-eight thousand, five hundred sixty-three".