211426 has 8 divisors (see below), whose sum is σ = 322524. Its totient is φ = 103920.

The previous prime is 211403. The next prime is 211427. The reversal of 211426 is 624112.

211426 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 2 ways, for example, as 189225 + 22201 = 435^2 + 149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (211427) 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, 745 + ... + 988.

2²¹¹⁴²⁶ is an apocalyptic number.

211426 is a deficient number, since it is larger than the sum of its proper divisors (111098).

211426 is a wasteful number, since it uses less digits than its factorization.

211426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its digits is 96, while the sum is 16.

The square root of 211426 is about 459.8108306684. The cubic root of 211426 is about 59.5734563423.

Adding to 211426 its reverse (624112), we get a palindrome (835538).

Subtracting 211426 from its reverse (624112), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 211426 in words is "two hundred eleven thousand, four hundred twenty-six".