549442 has 12 divisors (see below), whose sum is σ = 870966. Its totient is φ = 259920.

The previous prime is 549431. The next prime is 549443. The reversal of 549442 is 244945.

It can be written as a sum of positive squares in only one way, i.e., 549081 + 361 = 741^2 + 19^2 .

It is a super-2 number, since 2×549442² = 603773022728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 549442.

It is not an unprimeable number, because it can be changed into a prime (549443) by changing a digit.

549442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342 + ... + 1102.

2⁵⁴⁹⁴⁴² is an apocalyptic number.

549442 is a deficient number, since it is larger than the sum of its proper divisors (321524).

549442 is a wasteful number, since it uses less digits than its factorization.

549442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801 (or 782 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 549442 is about 741.2435497190. The cubic root of 549442 is about 81.9044097288.

It can be divided in two parts, 54944 and 2, that added together give a triangular number (54946 = T₃₃₁).

The spelling of 549442 in words is "five hundred forty-nine thousand, four hundred forty-two".