456221 has 4 divisors (see below), whose sum is σ = 457632. Its totient is φ = 454812.

The previous prime is 456193. The next prime is 456223. The reversal of 456221 is 122654.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-456221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 456193 and 456202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (456223) 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, 50 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (114408).

2⁴⁵⁶²²¹ is an apocalyptic number.

It is an amenable number.

456221 is a deficient number, since it is larger than the sum of its proper divisors (1411).

456221 is an equidigital number, since it uses as much as digits as its factorization.

456221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410.

The product of its digits is 480, while the sum is 20.

The square root of 456221 is about 675.4413372011. The cubic root of 456221 is about 76.9824551019.

Adding to 456221 its reverse (122654), we get a palindrome (578875).

The spelling of 456221 in words is "four hundred fifty-six thousand, two hundred twenty-one".