1421410421 has 2 divisors, whose sum is σ = 1421410422. Its totient is φ = 1421410420.

The previous prime is 1421410411. The next prime is 1421410429. The reversal of 1421410421 is 1240141241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813048196 + 608362225 = 28514^2 + 24665^2 .

It is an emirp because it is prime and its reverse (1240141241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421410421 - 2²² = 1417216117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1421410393 and 1421410402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421410429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710705210 + 710705211.

It is an arithmetic number, because the mean of its divisors is an integer number (710705211).

Almost surely, 2^1421410421 is an apocalyptic number.

It is an amenable number.

1421410421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421410421 is an equidigital number, since it uses as much as digits as its factorization.

1421410421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1421410421 is about 37701.5970616631. The cubic root of 1421410421 is about 1124.3628776987.

Adding to 1421410421 its reverse (1240141241), we get a palindrome (2661551662).

The spelling of 1421410421 in words is "one billion, four hundred twenty-one million, four hundred ten thousand, four hundred twenty-one".