242151 has 16 divisors (see below), whose sum is σ = 397824. Its totient is φ = 127584.

The previous prime is 242147. The next prime is 242161. The reversal of 242151 is 151242.

It is not a de Polignac number, because 242151 - 2² = 242147 is a prime.

242151 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 242151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (24864).

2²⁴²¹⁵¹ is an apocalyptic number.

242151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

242151 is a deficient number, since it is larger than the sum of its proper divisors (155673).

242151 is a wasteful number, since it uses less digits than its factorization.

242151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910.

The product of its digits is 80, while the sum is 15.

The square root of 242151 is about 492.0884066913. The cubic root of 242151 is about 62.3297553559.

Adding to 242151 its reverse (151242), we get a palindrome (393393).

Subtracting from 242151 its reverse (151242), we obtain a palindrome (90909).

It can be divided in two parts, 242 and 151, that added together give a palindrome (393).

The spelling of 242151 in words is "two hundred forty-two thousand, one hundred fifty-one".