242352521 has 2 divisors, whose sum is σ = 242352522. Its totient is φ = 242352520.

The previous prime is 242352497. The next prime is 242352547. The reversal of 242352521 is 125253242.

It is an a-pointer prime, because the next prime (242352547) can be obtained adding 242352521 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158886025 + 83466496 = 12605^2 + 9136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242352521 is a prime.

It is not a weakly prime, because it can be changed into another prime (242355521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121176260 + 121176261.

It is an arithmetic number, because the mean of its divisors is an integer number (121176261).

Almost surely, 2^242352521 is an apocalyptic number.

It is an amenable number.

242352521 is a deficient number, since it is larger than the sum of its proper divisors (1).

242352521 is an equidigital number, since it uses as much as digits as its factorization.

242352521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 26.

The square root of 242352521 is about 15567.6755169165. The cubic root of 242352521 is about 623.4704108785.

The spelling of 242352521 in words is "two hundred forty-two million, three hundred fifty-two thousand, five hundred twenty-one".