542139 has 8 divisors (see below), whose sum is σ = 778512. Its totient is φ = 333600.

The previous prime is 542131. The next prime is 542141. The reversal of 542139 is 931245.

542139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 542139 - 2³ = 542131 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 542139.

It is not an unprimeable number, because it can be changed into a prime (542131) 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, 6912 + ... + 6989.

It is an arithmetic number, because the mean of its divisors is an integer number (97314).

2⁵⁴²¹³⁹ is an apocalyptic number.

542139 is a deficient number, since it is larger than the sum of its proper divisors (236373).

542139 is a wasteful number, since it uses less digits than its factorization.

542139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13917.

The product of its digits is 1080, while the sum is 24.

The square root of 542139 is about 736.3008895825. The cubic root of 542139 is about 81.5399079396.

It can be divided in two parts, 5421 and 39, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 542139 in words is "five hundred forty-two thousand, one hundred thirty-nine".