545217 has 4 divisors (see below), whose sum is σ = 726960. Its totient is φ = 363476.

The previous prime is 545213. The next prime is 545231. The reversal of 545217 is 712545.

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 545217 - 2² = 545213 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (545213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90867 + ... + 90872.

It is an arithmetic number, because the mean of its divisors is an integer number (181740).

2⁵⁴⁵²¹⁷ is an apocalyptic number.

It is an amenable number.

545217 is a deficient number, since it is larger than the sum of its proper divisors (181743).

545217 is a wasteful number, since it uses less digits than its factorization.

545217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181742.

The product of its digits is 1400, while the sum is 24.

The square root of 545217 is about 738.3881093300. The cubic root of 545217 is about 81.6939313843.

The spelling of 545217 in words is "five hundred forty-five thousand, two hundred seventeen".