242815487 has 4 divisors (see below), whose sum is σ = 243379296. Its totient is φ = 242251680.

The previous prime is 242815483. The next prime is 242815499. The reversal of 242815487 is 784518242.

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 242815487 - 2² = 242815483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242815483) 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, 281258 + ... + 282119.

It is an arithmetic number, because the mean of its divisors is an integer number (60844824).

Almost surely, 2^242815487 is an apocalyptic number.

242815487 is a deficient number, since it is larger than the sum of its proper divisors (563809).

242815487 is an equidigital number, since it uses as much as digits as its factorization.

242815487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563808.

The product of its digits is 143360, while the sum is 41.

The square root of 242815487 is about 15582.5378870067. The cubic root of 242815487 is about 623.8671635043.

The spelling of 242815487 in words is "two hundred forty-two million, eight hundred fifteen thousand, four hundred eighty-seven".