649012 has 24 divisors (see below), whose sum is σ = 1398656. Its totient is φ = 256608.

The previous prime is 649007. The next prime is 649039. The reversal of 649012 is 210946.

It is a super-2 number, since 2×649012² = 842433152288, which contains 22 as substring.

It is a congruent number.

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, 528 + ... + 1255.

2⁶⁴⁹⁰¹² is an apocalyptic number.

It is an amenable number.

649012 is an abundant number, since it is smaller than the sum of its proper divisors (749644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649012 is a wasteful number, since it uses less digits than its factorization.

649012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 649012 is about 805.6128102259. The cubic root of 649012 is about 86.5799988300.

Adding to 649012 its reverse (210946), we get a palindrome (859958).

The spelling of 649012 in words is "six hundred forty-nine thousand, twelve".