1144665427 has 4 divisors (see below), whose sum is σ = 1163430496. Its totient is φ = 1125900360.

The previous prime is 1144665419. The next prime is 1144665463. The reversal of 1144665427 is 7245664411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1144665427 - 2³ = 1144665419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1144665427.

It is not an unprimeable number, because it can be changed into a prime (1144665527) 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, 9382443 + ... + 9382564.

It is an arithmetic number, because the mean of its divisors is an integer number (290857624).

Almost surely, 2^1144665427 is an apocalyptic number.

1144665427 is a deficient number, since it is larger than the sum of its proper divisors (18765069).

1144665427 is an equidigital number, since it uses as much as digits as its factorization.

1144665427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18765068.

The product of its digits is 161280, while the sum is 40.

The square root of 1144665427 is about 33832.9045013874. The cubic root of 1144665427 is about 1046.0670486167.

The spelling of 1144665427 in words is "one billion, one hundred forty-four million, six hundred sixty-five thousand, four hundred twenty-seven".