648212 has 6 divisors (see below), whose sum is σ = 1134378. Its totient is φ = 324104.

The previous prime is 648211. The next prime is 648217. The reversal of 648212 is 212846.

It can be written as a sum of positive squares in only one way, i.e., 583696 + 64516 = 764^2 + 254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81023 + ... + 81030.

It is an arithmetic number, because the mean of its divisors is an integer number (189063).

2⁶⁴⁸²¹² is an apocalyptic number.

It is an amenable number.

648212 is a deficient number, since it is larger than the sum of its proper divisors (486166).

648212 is a wasteful number, since it uses less digits than its factorization.

648212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162057 (or 162055 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 648212 is about 805.1161406903. The cubic root of 648212 is about 86.5444101311.

The spelling of 648212 in words is "six hundred forty-eight thousand, two hundred twelve".