497221 has 4 divisors (see below), whose sum is σ = 499212. Its totient is φ = 495232.

The previous prime is 497197. The next prime is 497239. The reversal of 497221 is 122794.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 474721 + 22500 = 689^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 497221 - 2⁷ = 497093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497261) 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, 556 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (124803).

2⁴⁹⁷²²¹ is an apocalyptic number.

It is an amenable number.

497221 is a deficient number, since it is larger than the sum of its proper divisors (1991).

497221 is a wasteful number, since it uses less digits than its factorization.

497221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

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

The square root of 497221 is about 705.1389933907. The cubic root of 497221 is about 79.2227330756. Note that the first 3 decimals are identical.

The spelling of 497221 in words is "four hundred ninety-seven thousand, two hundred twenty-one".