649247 has 8 divisors (see below), whose sum is σ = 694512. Its totient is φ = 604800.

The previous prime is 649217. The next prime is 649261. The reversal of 649247 is 742946.

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

It is a cyclic number.

It is not a de Polignac number, because 649247 - 2⁶ = 649183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649217) by changing a digit.

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, 2972 + ... + 3182.

It is an arithmetic number, because the mean of its divisors is an integer number (86814).

2⁶⁴⁹²⁴⁷ is an apocalyptic number.

649247 is a deficient number, since it is larger than the sum of its proper divisors (45265).

649247 is a wasteful number, since it uses less digits than its factorization.

649247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409.

The product of its digits is 12096, while the sum is 32.

The square root of 649247 is about 805.7586487280. The cubic root of 649247 is about 86.5904474526.

The spelling of 649247 in words is "six hundred forty-nine thousand, two hundred forty-seven".