242281987 has 2 divisors, whose sum is σ = 242281988. Its totient is φ = 242281986.

The previous prime is 242281973. The next prime is 242282003. The reversal of 242281987 is 789182242.

242281987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242281987 - 2¹⁵ = 242249219 is a prime.

It is a super-2 number, since 2×242281987² = 117401122449336338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242281687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121140993 + 121140994.

It is an arithmetic number, because the mean of its divisors is an integer number (121140994).

Almost surely, 2^242281987 is an apocalyptic number.

242281987 is a deficient number, since it is larger than the sum of its proper divisors (1).

242281987 is an equidigital number, since it uses as much as digits as its factorization.

242281987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 242281987 is about 15565.4099528409. The cubic root of 242281987 is about 623.4099203051.

The spelling of 242281987 in words is "two hundred forty-two million, two hundred eighty-one thousand, nine hundred eighty-seven".