621105241 has 2 divisors, whose sum is σ = 621105242. Its totient is φ = 621105240.

The previous prime is 621105239. The next prime is 621105263. The reversal of 621105241 is 142501126.

It is an a-pointer prime, because the next prime (621105263) can be obtained adding 621105241 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 500193225 + 120912016 = 22365^2 + 10996^2 .

It is a cyclic number.

It is not a de Polignac number, because 621105241 - 2¹ = 621105239 is a prime.

Together with 621105239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (621105211) 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, 310552620 + 310552621.

It is an arithmetic number, because the mean of its divisors is an integer number (310552621).

Almost surely, 2^621105241 is an apocalyptic number.

It is an amenable number.

621105241 is a deficient number, since it is larger than the sum of its proper divisors (1).

621105241 is an equidigital number, since it uses as much as digits as its factorization.

621105241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 621105241 is about 24921.9830872264. The cubic root of 621105241 is about 853.2082863064.

Adding to 621105241 its reverse (142501126), we get a palindrome (763606367).

The spelling of 621105241 in words is "six hundred twenty-one million, one hundred five thousand, two hundred forty-one".