1420461221 has 2 divisors, whose sum is σ = 1420461222. Its totient is φ = 1420461220.

The previous prime is 1420461193. The next prime is 1420461241. The reversal of 1420461221 is 1221640241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991557121 + 428904100 = 31489^2 + 20710^2 .

It is an emirp because it is prime and its reverse (1221640241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1420461221 - 2³⁰ = 346719397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420461241) 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, 710230610 + 710230611.

It is an arithmetic number, because the mean of its divisors is an integer number (710230611).

Almost surely, 2^1420461221 is an apocalyptic number.

It is an amenable number.

1420461221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420461221 is an equidigital number, since it uses as much as digits as its factorization.

1420461221 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 1420461221 is about 37689.0066332346. The cubic root of 1420461221 is about 1124.1125435048.

The spelling of 1420461221 in words is "one billion, four hundred twenty million, four hundred sixty-one thousand, two hundred twenty-one".