542549 has 8 divisors (see below), whose sum is σ = 624960. Its totient is φ = 461376.

The previous prime is 542539. The next prime is 542551. The reversal of 542549 is 945245.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 542549 - 2⁴ = 542533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037 + ... + 1469.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

2⁵⁴²⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

542549 is a deficient number, since it is larger than the sum of its proper divisors (82411).

542549 is a wasteful number, since it uses less digits than its factorization.

542549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619.

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

The square root of 542549 is about 736.5792557492. The cubic root of 542549 is about 81.5604579819.

The spelling of 542549 in words is "five hundred forty-two thousand, five hundred forty-nine".