242857249 has 4 divisors (see below), whose sum is σ = 248505136. Its totient is φ = 237209364.

The previous prime is 242857243. The next prime is 242857261. The reversal of 242857249 is 942758242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242857249 - 2⁵ = 242857217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 5647843 = 242857249 / (2 + 4 + 2 + 8 + 5 + 7 + 2 + 4 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242857243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823879 + ... + 2823964.

It is an arithmetic number, because the mean of its divisors is an integer number (62126284).

Almost surely, 2^242857249 is an apocalyptic number.

It is an amenable number.

242857249 is a deficient number, since it is larger than the sum of its proper divisors (5647887).

242857249 is an equidigital number, since it uses as much as digits as its factorization.

242857249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5647886.

The product of its digits is 322560, while the sum is 43.

The square root of 242857249 is about 15583.8778550141. The cubic root of 242857249 is about 623.9029278992.

The spelling of 242857249 in words is "two hundred forty-two million, eight hundred fifty-seven thousand, two hundred forty-nine".