242387381 has 2 divisors, whose sum is σ = 242387382. Its totient is φ = 242387380.

The previous prime is 242387371. The next prime is 242387429. The reversal of 242387381 is 183783242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242300356 + 87025 = 15566^2 + 295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242387381 is a prime.

It is a super-2 number, since 2×242387381² = 117503284936078322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242387311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121193690 + 121193691.

It is an arithmetic number, because the mean of its divisors is an integer number (121193691).

Almost surely, 2^242387381 is an apocalyptic number.

It is an amenable number.

242387381 is a deficient number, since it is larger than the sum of its proper divisors (1).

242387381 is an equidigital number, since it uses as much as digits as its factorization.

242387381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 242387381 is about 15568.7951043104. The cubic root of 242387381 is about 623.5003027848.

The spelling of 242387381 in words is "two hundred forty-two million, three hundred eighty-seven thousand, three hundred eighty-one".