212506004 has 6 divisors (see below), whose sum is σ = 371885514. Its totient is φ = 106253000.

The previous prime is 212506003. The next prime is 212506009. The reversal of 212506004 is 400605212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 210250000 + 2256004 = 14500^2 + 1502^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212506003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26563247 + ... + 26563254.

It is an arithmetic number, because the mean of its divisors is an integer number (61980919).

Almost surely, 2^212506004 is an apocalyptic number.

It is an amenable number.

212506004 is a deficient number, since it is larger than the sum of its proper divisors (159379510).

212506004 is a wasteful number, since it uses less digits than its factorization.

212506004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53126505 (or 53126503 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212506004 is about 14577.5856711597. The cubic root of 212506004 is about 596.7472160465.

The spelling of 212506004 in words is "two hundred twelve million, five hundred six thousand, four".