1421299109 has 4 divisors (see below), whose sum is σ = 1421636160. Its totient is φ = 1420962060.

The previous prime is 1421299063. The next prime is 1421299111. The reversal of 1421299109 is 9019921241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9019921241 = 1097 ⋅8222353.

It is a cyclic number.

It is not a de Polignac number, because 1421299109 - 2²⁴ = 1404521893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421299189) 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 in 3 ways as a sum of consecutive naturals, for example, 162119 + ... + 170660.

It is an arithmetic number, because the mean of its divisors is an integer number (355409040).

Almost surely, 2^1421299109 is an apocalyptic number.

It is an amenable number.

1421299109 is a deficient number, since it is larger than the sum of its proper divisors (337051).

1421299109 is an equidigital number, since it uses as much as digits as its factorization.

1421299109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337050.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1421299109 is about 37700.1208088250. The cubic root of 1421299109 is about 1124.3335269576. Note that the first 3 decimals are identical.

The spelling of 1421299109 in words is "one billion, four hundred twenty-one million, two hundred ninety-nine thousand, one hundred nine".