542389 has 4 divisors (see below), whose sum is σ = 555660. Its totient is φ = 529120.

The previous prime is 542371. The next prime is 542401. The reversal of 542389 is 983245.

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 321489 + 220900 = 567^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 542389 - 2⁷ = 542261 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 542389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6574 + ... + 6655.

It is an arithmetic number, because the mean of its divisors is an integer number (138915).

2⁵⁴²³⁸⁹ is an apocalyptic number.

It is an amenable number.

542389 is a deficient number, since it is larger than the sum of its proper divisors (13271).

542389 is a wasteful number, since it uses less digits than its factorization.

542389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13270.

The product of its digits is 8640, while the sum is 31.

The square root of 542389 is about 736.4706375681. The cubic root of 542389 is about 81.5524396854.

The spelling of 542389 in words is "five hundred forty-two thousand, three hundred eighty-nine".