1421063809 has 27 divisors (see below), whose sum is σ = 1643893699. Its totient is φ = 1227414320.

The previous prime is 1421063803. The next prime is 1421063821. The reversal of 1421063809 is 9083601241.

The square root of 1421063809 is 37697.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 166487409 + 1254576400 = 12903^2 + 35420^2 .

It is not a de Polignac number, because 1421063809 - 2¹⁹ = 1420539521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421063803) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9537267 + ... + 9537415.

Almost surely, 2^1421063809 is an apocalyptic number.

1421063809 is the 37697-th square number.

1421063809 is the 18849-th centered octagonal number.

It is an amenable number.

1421063809 is a deficient number, since it is larger than the sum of its proper divisors (222829890).

1421063809 is an equidigital number, since it uses as much as digits as its factorization.

1421063809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The cubic root of 1421063809 is about 1124.2714780246.

The spelling of 1421063809 in words is "one billion, four hundred twenty-one million, sixty-three thousand, eight hundred nine".