154242 has 48 divisors (see below), whose sum is σ = 393120. Its totient is φ = 43200.

The previous prime is 154229. The next prime is 154243. The reversal of 154242 is 242451.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (154243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3742 + ... + 3782.

It is an arithmetic number, because the mean of its divisors is an integer number (8190).

2¹⁵⁴²⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196560).

154242 is an abundant number, since it is smaller than the sum of its proper divisors (238878).

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

154242 is a wasteful number, since it uses less digits than its factorization.

154242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 76 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 154242 is about 392.7365529207. The cubic root of 154242 is about 53.6291461739.

Adding to 154242 its reverse (242451), we get a palindrome (396693).

Subtracting 154242 from its reverse (242451), we obtain a square (88209 = 297²).

The spelling of 154242 in words is "one hundred fifty-four thousand, two hundred forty-two".