411861221 has 2 divisors, whose sum is σ = 411861222. Its totient is φ = 411861220.

The previous prime is 411861209. The next prime is 411861223. The reversal of 411861221 is 122168114.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283922500 + 127938721 = 16850^2 + 11311^2 .

It is a cyclic number.

It is not a de Polignac number, because 411861221 - 2¹⁸ = 411599077 is a prime.

It is a super-2 number, since 2×411861221² = 339259330727221682, which contains 22 as substring.

Together with 411861223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (411861223) 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, 205930610 + 205930611.

It is an arithmetic number, because the mean of its divisors is an integer number (205930611).

Almost surely, 2^411861221 is an apocalyptic number.

It is an amenable number.

411861221 is a deficient number, since it is larger than the sum of its proper divisors (1).

411861221 is an equidigital number, since it uses as much as digits as its factorization.

411861221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 26.

The square root of 411861221 is about 20294.3642669585. The cubic root of 411861221 is about 744.0183283774.

The spelling of 411861221 in words is "four hundred eleven million, eight hundred sixty-one thousand, two hundred twenty-one".