542729 has 4 divisors (see below), whose sum is σ = 592080. Its totient is φ = 493380.

The previous prime is 542723. The next prime is 542747. The reversal of 542729 is 927245.

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 542729 - 2⁴ = 542713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (542723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24659 + ... + 24680.

It is an arithmetic number, because the mean of its divisors is an integer number (148020).

2⁵⁴²⁷²⁹ is an apocalyptic number.

It is an amenable number.

542729 is a deficient number, since it is larger than the sum of its proper divisors (49351).

542729 is a wasteful number, since it uses less digits than its factorization.

542729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49350.

The product of its digits is 5040, while the sum is 29.

The square root of 542729 is about 736.7014320605. The cubic root of 542729 is about 81.5694766814.

The spelling of 542729 in words is "five hundred forty-two thousand, seven hundred twenty-nine".