411640421 has 2 divisors, whose sum is σ = 411640422. Its totient is φ = 411640420.

The previous prime is 411640417. The next prime is 411640423. The reversal of 411640421 is 124046114.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309408100 + 102232321 = 17590^2 + 10111^2 .

It is a cyclic number.

It is not a de Polignac number, because 411640421 - 2² = 411640417 is a prime.

Together with 411640423, 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 (411640423) 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, 205820210 + 205820211.

It is an arithmetic number, because the mean of its divisors is an integer number (205820211).

Almost surely, 2^411640421 is an apocalyptic number.

It is an amenable number.

411640421 is a deficient number, since it is larger than the sum of its proper divisors (1).

411640421 is an equidigital number, since it uses as much as digits as its factorization.

411640421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 411640421 is about 20288.9236037795. The cubic root of 411640421 is about 743.8853478133.

Adding to 411640421 its reverse (124046114), we get a palindrome (535686535).

The spelling of 411640421 in words is "four hundred eleven million, six hundred forty thousand, four hundred twenty-one".