542989 has 4 divisors (see below), whose sum is σ = 549180. Its totient is φ = 536800.

The previous prime is 542987. The next prime is 542999. The reversal of 542989 is 989245.

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

It can be written as a sum of positive squares in 2 ways, for example, as 218089 + 324900 = 467^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 542989 - 2¹ = 542987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542981) 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, 2962 + ... + 3139.

It is an arithmetic number, because the mean of its divisors is an integer number (137295).

2⁵⁴²⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

542989 is a deficient number, since it is larger than the sum of its proper divisors (6191).

542989 is an equidigital number, since it uses as much as digits as its factorization.

542989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6190.

The product of its digits is 25920, while the sum is 37.

The square root of 542989 is about 736.8778731920. The cubic root of 542989 is about 81.5825001721.

The spelling of 542989 in words is "five hundred forty-two thousand, nine hundred eighty-nine".