241621451 has 2 divisors, whose sum is σ = 241621452. Its totient is φ = 241621450.

The previous prime is 241621441. The next prime is 241621453. The reversal of 241621451 is 154126142.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-241621451 is a prime.

Together with 241621453, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 241621451.

It is not a weakly prime, because it can be changed into another prime (241621453) 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, 120810725 + 120810726.

It is an arithmetic number, because the mean of its divisors is an integer number (120810726).

Almost surely, 2^241621451 is an apocalyptic number.

241621451 is a deficient number, since it is larger than the sum of its proper divisors (1).

241621451 is an equidigital number, since it uses as much as digits as its factorization.

241621451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 241621451 is about 15544.1773986274. The cubic root of 241621451 is about 622.8428682711.

Adding to 241621451 its reverse (154126142), we get a palindrome (395747593).

The spelling of 241621451 in words is "two hundred forty-one million, six hundred twenty-one thousand, four hundred fifty-one".