242457387 has 4 divisors (see below), whose sum is σ = 323276520. Its totient is φ = 161638256.

The previous prime is 242457377. The next prime is 242457409. The reversal of 242457387 is 783754242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242457387 - 2⁶ = 242457323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242457307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40409562 + ... + 40409567.

It is an arithmetic number, because the mean of its divisors is an integer number (80819130).

Almost surely, 2^242457387 is an apocalyptic number.

242457387 is a deficient number, since it is larger than the sum of its proper divisors (80819133).

242457387 is an equidigital number, since it uses as much as digits as its factorization.

242457387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80819132.

The product of its digits is 376320, while the sum is 42.

The square root of 242457387 is about 15571.0432213131. The cubic root of 242457387 is about 623.5603231820.

The spelling of 242457387 in words is "two hundred forty-two million, four hundred fifty-seven thousand, three hundred eighty-seven".