242571 has 8 divisors (see below), whose sum is σ = 369664. Its totient is φ = 138600.

The previous prime is 242551. The next prime is 242591. The reversal of 242571 is 175242.

It is an interprime number because it is at equal distance from previous prime (242551) and next prime (242591).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 242571 - 2⁹ = 242059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11551 = 242571 / (2 + 4 + 2 + 5 + 7 + 1).

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242521) by changing a digit.

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, 5755 + ... + 5796.

It is an arithmetic number, because the mean of its divisors is an integer number (46208).

2²⁴²⁵⁷¹ is an apocalyptic number.

242571 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

242571 is a deficient number, since it is larger than the sum of its proper divisors (127093).

242571 is a wasteful number, since it uses less digits than its factorization.

242571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11561.

The product of its digits is 560, while the sum is 21.

The square root of 242571 is about 492.5149743916. The cubic root of 242571 is about 62.3657705925.

The spelling of 242571 in words is "two hundred forty-two thousand, five hundred seventy-one".