649212 has 12 divisors (see below), whose sum is σ = 1514856. Its totient is φ = 216400.

The previous prime is 649183. The next prime is 649217. The reversal of 649212 is 212946.

It is a tau number, because it is divible by the number of its divisors (12).

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 649212.

It is not an unprimeable number, because it can be changed into a prime (649217) 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, 27039 + ... + 27062.

It is an arithmetic number, because the mean of its divisors is an integer number (126238).

2⁶⁴⁹²¹² is an apocalyptic number.

It is an amenable number.

649212 is an abundant number, since it is smaller than the sum of its proper divisors (865644).

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

649212 is a wasteful number, since it uses less digits than its factorization.

649212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54108 (or 54106 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 649212 is about 805.7369297730. The cubic root of 649212 is about 86.5888914346.

It can be divided in two parts, 649 and 212, that added together give a triangular number (861 = T₄₁).

The spelling of 649212 in words is "six hundred forty-nine thousand, two hundred twelve".