212420641 has 4 divisors (see below), whose sum is σ = 212716800. Its totient is φ = 212124484.

The previous prime is 212420639. The next prime is 212420653. The reversal of 212420641 is 146024212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212420641 - 2¹ = 212420639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212420141) 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, 147001 + ... + 148438.

It is an arithmetic number, because the mean of its divisors is an integer number (53179200).

Almost surely, 2^212420641 is an apocalyptic number.

It is an amenable number.

212420641 is a deficient number, since it is larger than the sum of its proper divisors (296159).

212420641 is an equidigital number, since it uses as much as digits as its factorization.

212420641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296158.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 212420641 is about 14574.6574916874. The cubic root of 212420641 is about 596.6673015123.

Adding to 212420641 its reverse (146024212), we get a palindrome (358444853).

The spelling of 212420641 in words is "two hundred twelve million, four hundred twenty thousand, six hundred forty-one".