1427445191 has 4 divisors (see below), whose sum is σ = 1427548584. Its totient is φ = 1427341800.

The previous prime is 1427445133. The next prime is 1427445193. The reversal of 1427445191 is 1915447241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1915447241 = 271 ⋅7068071.

It is a cyclic number.

It is not a de Polignac number, because 1427445191 - 2³⁰ = 353703367 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 (1427445193) 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, 27080 + ... + 59901.

It is an arithmetic number, because the mean of its divisors is an integer number (356887146).

Almost surely, 2^1427445191 is an apocalyptic number.

1427445191 is a deficient number, since it is larger than the sum of its proper divisors (103393).

1427445191 is an equidigital number, since it uses as much as digits as its factorization.

1427445191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103392.

The product of its digits is 40320, while the sum is 38.

The square root of 1427445191 is about 37781.5456406961. The cubic root of 1427445191 is about 1125.9518373417.

The spelling of 1427445191 in words is "one billion, four hundred twenty-seven million, four hundred forty-five thousand, one hundred ninety-one".