242505451 has 2 divisors, whose sum is σ = 242505452. Its totient is φ = 242505450.

The previous prime is 242505443. The next prime is 242505463. The reversal of 242505451 is 154505242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242505451 - 2³ = 242505443 is a prime.

It is not a weakly prime, because it can be changed into another prime (242505401) 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, 121252725 + 121252726.

It is an arithmetic number, because the mean of its divisors is an integer number (121252726).

Almost surely, 2^242505451 is an apocalyptic number.

242505451 is a deficient number, since it is larger than the sum of its proper divisors (1).

242505451 is an equidigital number, since it uses as much as digits as its factorization.

242505451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 242505451 is about 15572.5865224760. The cubic root of 242505451 is about 623.6015246808.

The spelling of 242505451 in words is "two hundred forty-two million, five hundred five thousand, four hundred fifty-one".