213726 has 16 divisors (see below), whose sum is σ = 432000. Its totient is φ = 70488.

The previous prime is 213721. The next prime is 213727. The reversal of 213726 is 627312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (27000).

2²¹³⁷²⁶ is an apocalyptic number.

213726 is an abundant number, since it is smaller than the sum of its proper divisors (218274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213726 is a wasteful number, since it uses less digits than its factorization.

213726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383.

The product of its digits is 504, while the sum is 21.

The square root of 213726 is about 462.3050940667. The cubic root of 213726 is about 59.7887011982.

It can be divided in two parts, 213 and 726, that added together give a palindrome (939).

The spelling of 213726 in words is "two hundred thirteen thousand, seven hundred twenty-six".