549542 has 16 divisors (see below), whose sum is σ = 997920. Its totient is φ = 221568.

The previous prime is 549533. The next prime is 549547. The reversal of 549542 is 245945.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549547) by changing a digit.

549542 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 7 ways as a sum of consecutive naturals, for example, 917 + ... + 1392.

It is an arithmetic number, because the mean of its divisors is an integer number (62370).

2⁵⁴⁹⁵⁴² is an apocalyptic number.

549542 is a deficient number, since it is larger than the sum of its proper divisors (448378).

549542 is a wasteful number, since it uses less digits than its factorization.

549542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335.

The product of its digits is 7200, while the sum is 29.

The square root of 549542 is about 741.3110008627. The cubic root of 549542 is about 81.9093783722.

The spelling of 549542 in words is "five hundred forty-nine thousand, five hundred forty-two".