549251 has 4 divisors (see below), whose sum is σ = 554400. Its totient is φ = 544104.

The previous prime is 549247. The next prime is 549257. The reversal of 549251 is 152945.

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

It is a cyclic number.

It is not a de Polignac number, because 549251 - 2² = 549247 is a prime.

It is a super-2 number, since 2×549251² = 603353322002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 549251.

It is not an unprimeable number, because it can be changed into a prime (549257) 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, 2411 + ... + 2628.

It is an arithmetic number, because the mean of its divisors is an integer number (138600).

2⁵⁴⁹²⁵¹ is an apocalyptic number.

549251 is a deficient number, since it is larger than the sum of its proper divisors (5149).

549251 is a wasteful number, since it uses less digits than its factorization.

549251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148.

The product of its digits is 1800, while the sum is 26.

The square root of 549251 is about 741.1147009741. The cubic root of 549251 is about 81.8949179442.

The spelling of 549251 in words is "five hundred forty-nine thousand, two hundred fifty-one".