262221 has 4 divisors (see below), whose sum is σ = 349632. Its totient is φ = 174812.

The previous prime is 262217. The next prime is 262231. The reversal of 262221 is 122262.

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 262221 - 2² = 262217 is a prime.

It is a d-powerful number, because it can be written as 2 + 6 + 2² + 2⁶ + 2¹⁸ + 1 .

It is a D-number.

262221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 262221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (262231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43701 + ... + 43706.

It is an arithmetic number, because the mean of its divisors is an integer number (87408).

2²⁶²²²¹ is an apocalyptic number.

It is an amenable number.

262221 is a deficient number, since it is larger than the sum of its proper divisors (87411).

262221 is an equidigital number, since it uses as much as digits as its factorization.

262221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87410.

The product of its digits is 96, while the sum is 15.

The square root of 262221 is about 512.0751897915. The cubic root of 262221 is about 64.0062656626.

Adding to 262221 its reverse (122262), we get a palindrome (384483).

The spelling of 262221 in words is "two hundred sixty-two thousand, two hundred twenty-one".