242455691 has 2 divisors, whose sum is σ = 242455692. Its totient is φ = 242455690.

The previous prime is 242455621. The next prime is 242455693. The reversal of 242455691 is 196554242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242455691 is a prime.

Together with 242455693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242455693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121227845 + 121227846.

It is an arithmetic number, because the mean of its divisors is an integer number (121227846).

Almost surely, 2^242455691 is an apocalyptic number.

242455691 is a deficient number, since it is larger than the sum of its proper divisors (1).

242455691 is an equidigital number, since it uses as much as digits as its factorization.

242455691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 242455691 is about 15570.9887611545. The cubic root of 242455691 is about 623.5588692348.

The spelling of 242455691 in words is "two hundred forty-two million, four hundred fifty-five thousand, six hundred ninety-one".