1420442209 has 4 divisors (see below), whose sum is σ = 1422598320. Its totient is φ = 1418286100.

The previous prime is 1420442197. The next prime is 1420442213. The reversal of 1420442209 is 9022440241.

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: 9022440241 = 29 ⋅311118629.

It is a cyclic number.

It is not a de Polignac number, because 1420442209 - 2⁷ = 1420442081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420442269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077067 + ... + 1078384.

It is an arithmetic number, because the mean of its divisors is an integer number (355649580).

Almost surely, 2^1420442209 is an apocalyptic number.

It is an amenable number.

1420442209 is a deficient number, since it is larger than the sum of its proper divisors (2156111).

1420442209 is an equidigital number, since it uses as much as digits as its factorization.

1420442209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156110.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1420442209 is about 37688.7544103012. The cubic root of 1420442209 is about 1124.1075282973.

The spelling of 1420442209 in words is "one billion, four hundred twenty million, four hundred forty-two thousand, two hundred nine".