649455 has 16 divisors (see below), whose sum is σ = 1075680. Its totient is φ = 334208.

The previous prime is 649427. The next prime is 649457. The reversal of 649455 is 554946.

It is a cyclic number.

It is not a de Polignac number, because 649455 - 2⁵ = 649423 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649455.

It is not an unprimeable number, because it can be changed into a prime (649457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312 + ... + 1181.

It is an arithmetic number, because the mean of its divisors is an integer number (67230).

2⁶⁴⁹⁴⁵⁵ is an apocalyptic number.

649455 is a deficient number, since it is larger than the sum of its proper divisors (426225).

649455 is a wasteful number, since it uses less digits than its factorization.

649455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530.

The product of its digits is 21600, while the sum is 33.

The square root of 649455 is about 805.8877092995. The cubic root of 649455 is about 86.5996934920.

The spelling of 649455 in words is "six hundred forty-nine thousand, four hundred fifty-five".