649545 has 16 divisors (see below), whose sum is σ = 1119552. Its totient is φ = 319680.

The previous prime is 649541. The next prime is 649559. The reversal of 649545 is 545946.

649545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 649545 - 2² = 649541 is a prime.

649545 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649545.

It is not an unprimeable number, because it can be changed into a prime (649541) 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, 1471 + ... + 1860.

It is an arithmetic number, because the mean of its divisors is an integer number (69972).

649545 is a Friedman number, since it can be written as 6+9^5*(4*4-5), using all its digits and the basic arithmetic operations.

2⁶⁴⁹⁵⁴⁵ is an apocalyptic number.

649545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

649545 is a deficient number, since it is larger than the sum of its proper divisors (470007).

649545 is a wasteful number, since it uses less digits than its factorization.

649545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352.

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

The square root of 649545 is about 805.9435464100. The cubic root of 649545 is about 86.6036935703.

The spelling of 649545 in words is "six hundred forty-nine thousand, five hundred forty-five".