242154 has 24 divisors (see below), whose sum is σ = 572832. Its totient is φ = 73320.

The previous prime is 242147. The next prime is 242161. The reversal of 242154 is 451242.

It is an interprime number because it is at equal distance from previous prime (242147) and next prime (242161).

It is a Smith number, since the sum of its digits (18) coincides with the sum of the digits of its prime factors.

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

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 414 + ... + 809.

It is an arithmetic number, because the mean of its divisors is an integer number (23868).

2²⁴²¹⁵⁴ is an apocalyptic number.

242154 is an abundant number, since it is smaller than the sum of its proper divisors (330678).

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

242154 is a wasteful number, since it uses less digits than its factorization.

242154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242 (or 1239 counting only the distinct ones).

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

The square root of 242154 is about 492.0914549146. The cubic root of 242154 is about 62.3300127552.

Adding to 242154 its reverse (451242), we get a palindrome (693396).

The spelling of 242154 in words is "two hundred forty-two thousand, one hundred fifty-four".