649105 has 8 divisors (see below), whose sum is σ = 785664. Its totient is φ = 514800.

The previous prime is 649093. The next prime is 649123. The reversal of 649105 is 501946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 649105 - 2⁵ = 649073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649105.

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 7 ways as a sum of consecutive naturals, for example, 160 + ... + 1150.

It is an arithmetic number, because the mean of its divisors is an integer number (98208).

2⁶⁴⁹¹⁰⁵ is an apocalyptic number.

It is an amenable number.

649105 is a deficient number, since it is larger than the sum of its proper divisors (136559).

649105 is a wasteful number, since it uses less digits than its factorization.

649105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 649105 is about 805.6705281938. The cubic root of 649105 is about 86.5841341183.

Subtracting from 649105 its product of nonzero digits (1080), we obtain a square (648025 = 805²).

The spelling of 649105 in words is "six hundred forty-nine thousand, one hundred five".