212712407 has 4 divisors (see below), whose sum is σ = 214777680. Its totient is φ = 210647136.

The previous prime is 212712397. The next prime is 212712413. The reversal of 212712407 is 704217212.

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

It is a cyclic number.

It is not a de Polignac number, because 212712407 - 2⁶ = 212712343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212712107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032482 + ... + 1032687.

It is an arithmetic number, because the mean of its divisors is an integer number (53694420).

Almost surely, 2^212712407 is an apocalyptic number.

212712407 is a deficient number, since it is larger than the sum of its proper divisors (2065273).

212712407 is a wasteful number, since it uses less digits than its factorization.

212712407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065272.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 212712407 is about 14584.6634174396. The cubic root of 212712407 is about 596.9403565651.

Adding to 212712407 its reverse (704217212), we get a palindrome (916929619).

The spelling of 212712407 in words is "two hundred twelve million, seven hundred twelve thousand, four hundred seven".