649259 has 4 divisors (see below), whose sum is σ = 699216. Its totient is φ = 599304.

The previous prime is 649217. The next prime is 649261. The reversal of 649259 is 952946.

649259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649259 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649259.

It is not an unprimeable number, because it can be changed into a prime (649279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24959 + ... + 24984.

It is an arithmetic number, because the mean of its divisors is an integer number (174804).

2⁶⁴⁹²⁵⁹ is an apocalyptic number.

649259 is a deficient number, since it is larger than the sum of its proper divisors (49957).

649259 is a wasteful number, since it uses less digits than its factorization.

649259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49956.

The product of its digits is 19440, while the sum is 35.

The square root of 649259 is about 805.7660950921. The cubic root of 649259 is about 86.5909809317.

The spelling of 649259 in words is "six hundred forty-nine thousand, two hundred fifty-nine".