242821499 has 2 divisors, whose sum is σ = 242821500. Its totient is φ = 242821498.

The previous prime is 242821487. The next prime is 242821529. The reversal of 242821499 is 994128242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242821499 - 2²⁴ = 226044283 is a prime.

It is not a weakly prime, because it can be changed into another prime (242821099) 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 as a sum of consecutive naturals, namely, 121410749 + 121410750.

It is an arithmetic number, because the mean of its divisors is an integer number (121410750).

Almost surely, 2^242821499 is an apocalyptic number.

242821499 is a deficient number, since it is larger than the sum of its proper divisors (1).

242821499 is an equidigital number, since it uses as much as digits as its factorization.

242821499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 242821499 is about 15582.7307940553. The cubic root of 242821499 is about 623.8723123500.

The spelling of 242821499 in words is "two hundred forty-two million, eight hundred twenty-one thousand, four hundred ninety-nine".