1042410221 has 2 divisors, whose sum is σ = 1042410222. Its totient is φ = 1042410220.

The previous prime is 1042410179. The next prime is 1042410223. The reversal of 1042410221 is 1220142401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792422500 + 249987721 = 28150^2 + 15811^2 .

It is an emirp because it is prime and its reverse (1220142401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1042410221 - 2¹⁴ = 1042393837 is a prime.

Together with 1042410223, 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 1042410221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042410223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521205110 + 521205111.

It is an arithmetic number, because the mean of its divisors is an integer number (521205111).

Almost surely, 2^1042410221 is an apocalyptic number.

It is an amenable number.

1042410221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042410221 is an equidigital number, since it uses as much as digits as its factorization.

1042410221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1042410221 is about 32286.3782577111. The cubic root of 1042410221 is about 1013.9414724365.

Adding to 1042410221 its reverse (1220142401), we get a palindrome (2262552622).

The spelling of 1042410221 in words is "one billion, forty-two million, four hundred ten thousand, two hundred twenty-one".