212701261 has 4 divisors (see below), whose sum is σ = 219562624. Its totient is φ = 205839900.

The previous prime is 212701201. The next prime is 212701267. The reversal of 212701261 is 162107212.

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 212701261 - 2⁷ = 212701133 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 (212701267) 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 in 3 ways as a sum of consecutive naturals, for example, 3430635 + ... + 3430696.

It is an arithmetic number, because the mean of its divisors is an integer number (54890656).

Almost surely, 2^212701261 is an apocalyptic number.

It is an amenable number.

212701261 is a deficient number, since it is larger than the sum of its proper divisors (6861363).

212701261 is an equidigital number, since it uses as much as digits as its factorization.

212701261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861362.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 212701261 is about 14584.2812987134. The cubic root of 212701261 is about 596.9299299465.

Adding to 212701261 its reverse (162107212), we get a palindrome (374808473).

The spelling of 212701261 in words is "two hundred twelve million, seven hundred one thousand, two hundred sixty-one".