1420551305 has 4 divisors (see below), whose sum is σ = 1704661572. Its totient is φ = 1136441040.

The previous prime is 1420551289. The next prime is 1420551343. The reversal of 1420551305 is 5031550241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5031550241 = 811 ⋅6204131.

It can be written as a sum of positive squares in 2 ways, for example, as 875982409 + 544568896 = 29597^2 + 23336^2 .

It is not a de Polignac number, because 1420551305 - 2⁴ = 1420551289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142055126 + ... + 142055135.

It is an arithmetic number, because the mean of its divisors is an integer number (426165393).

Almost surely, 2^1420551305 is an apocalyptic number.

It is an amenable number.

1420551305 is a deficient number, since it is larger than the sum of its proper divisors (284110267).

1420551305 is an equidigital number, since it uses as much as digits as its factorization.

1420551305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284110266.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1420551305 is about 37690.2017107895. The cubic root of 1420551305 is about 1124.1363063062.

The spelling of 1420551305 in words is "one billion, four hundred twenty million, five hundred fifty-one thousand, three hundred five".