154542 has 16 divisors (see below), whose sum is σ = 316800. Its totient is φ = 50232.

The previous prime is 154523. The next prime is 154543. The reversal of 154542 is 245451.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154543) by changing a digit.

154542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 557.

It is an arithmetic number, because the mean of its divisors is an integer number (19800).

2¹⁵⁴⁵⁴² is an apocalyptic number.

154542 is an abundant number, since it is smaller than the sum of its proper divisors (162258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154542 is a wasteful number, since it uses less digits than its factorization.

154542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647.

The product of its digits is 800, while the sum is 21.

The square root of 154542 is about 393.1183028046. The cubic root of 154542 is about 53.6638931392.

Adding to 154542 its reverse (245451), we get a palindrome (399993).

Subtracting 154542 from its reverse (245451), we obtain a palindrome (90909).

It can be divided in two parts, 154 and 542, that added together give a palindrome (696).

The spelling of 154542 in words is "one hundred fifty-four thousand, five hundred forty-two".