479221 has 2 divisors, whose sum is σ = 479222. Its totient is φ = 479220.

The previous prime is 479209. The next prime is 479231. The reversal of 479221 is 122974.

479221 = 489² + 490².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240100 + 239121 = 490^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 479221 - 2⁵ = 479189 is a prime.

479221 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239610 + 239611.

It is an arithmetic number, because the mean of its divisors is an integer number (239611).

2⁴⁷⁹²²¹ is an apocalyptic number.

479221 is the 490-th centered square number.

It is an amenable number.

479221 is a deficient number, since it is larger than the sum of its proper divisors (1).

479221 is an equidigital number, since it uses as much as digits as its factorization.

479221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 479221 is about 692.2578999188. The cubic root of 479221 is about 78.2549731960.

The spelling of 479221 in words is "four hundred seventy-nine thousand, two hundred twenty-one".