542138 has 8 divisors (see below), whose sum is σ = 818688. Its totient is φ = 269244.

The previous prime is 542131. The next prime is 542141. The reversal of 542138 is 831245.

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

It is a super-2 number, since 2×542138² = 587827222088, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 542138.

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 3 ways as a sum of consecutive naturals, for example, 506 + ... + 1157.

It is an arithmetic number, because the mean of its divisors is an integer number (102336).

2⁵⁴²¹³⁸ is an apocalyptic number.

542138 is a deficient number, since it is larger than the sum of its proper divisors (276550).

542138 is a wasteful number, since it uses less digits than its factorization.

542138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828.

The product of its digits is 960, while the sum is 23.

The square root of 542138 is about 736.3002105120. The cubic root of 542138 is about 81.5398578049.

The spelling of 542138 in words is "five hundred forty-two thousand, one hundred thirty-eight".