1420805461 has 2 divisors, whose sum is σ = 1420805462. Its totient is φ = 1420805460.

The previous prime is 1420805459. The next prime is 1420805471. The reversal of 1420805461 is 1645080241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1420536100 + 269361 = 37690^2 + 519^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420805461 - 2¹ = 1420805459 is a prime.

Together with 1420805459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420805471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710402730 + 710402731.

It is an arithmetic number, because the mean of its divisors is an integer number (710402731).

Almost surely, 2^1420805461 is an apocalyptic number.

It is an amenable number.

1420805461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420805461 is an equidigital number, since it uses as much as digits as its factorization.

1420805461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 1420805461 is about 37693.5732055214. The cubic root of 1420805461 is about 1124.2033434133.

The spelling of 1420805461 in words is "one billion, four hundred twenty million, eight hundred five thousand, four hundred sixty-one".