242724321 has 12 divisors (see below), whose sum is σ = 400687872. Its totient is φ = 138699576.

The previous prime is 242724299. The next prime is 242724323. The reversal of 242724321 is 123427242.

It is not a de Polignac number, because 242724321 - 2⁹ = 242723809 is a prime.

It is a super-2 number, since 2×242724321² = 117830192009822082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242724323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1926321 + ... + 1926446.

It is an arithmetic number, because the mean of its divisors is an integer number (33390656).

Almost surely, 2^242724321 is an apocalyptic number.

242724321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242724321 is a deficient number, since it is larger than the sum of its proper divisors (157963551).

242724321 is a wasteful number, since it uses less digits than its factorization.

242724321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852780 (or 3852777 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 242724321 is about 15579.6123507615. The cubic root of 242724321 is about 623.7890759626.

The spelling of 242724321 in words is "two hundred forty-two million, seven hundred twenty-four thousand, three hundred twenty-one".