540142 has 4 divisors (see below), whose sum is σ = 810216. Its totient is φ = 270070.

The previous prime is 540139. The next prime is 540149. The reversal of 540142 is 241045.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135034 + ... + 135037.

It is an arithmetic number, because the mean of its divisors is an integer number (202554).

2⁵⁴⁰¹⁴² is an apocalyptic number.

540142 is a deficient number, since it is larger than the sum of its proper divisors (270074).

540142 is a wasteful number, since it uses less digits than its factorization.

540142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270073.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 540142 is about 734.9435352461. The cubic root of 540142 is about 81.4396657853.

Adding to 540142 its reverse (241045), we get a palindrome (781187).

The spelling of 540142 in words is "five hundred forty thousand, one hundred forty-two".