1144387 has 4 divisors (see below), whose sum is σ = 1152760. Its totient is φ = 1136016.

The previous prime is 1144379. The next prime is 1144393. The reversal of 1144387 is 7834411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7834411 = 13 ⋅602647.

It is a cyclic number.

It is not a de Polignac number, because 1144387 - 2³ = 1144379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144327) 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, 3978 + ... + 4255.

It is an arithmetic number, because the mean of its divisors is an integer number (288190).

2^1144387 is an apocalyptic number.

1144387 is a deficient number, since it is larger than the sum of its proper divisors (8373).

1144387 is an equidigital number, since it uses as much as digits as its factorization.

1144387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8372.

The product of its digits is 2688, while the sum is 28.

The square root of 1144387 is about 1069.7602535148. The cubic root of 1144387 is about 104.5982227055.

Adding to 1144387 its reverse (7834411), we get a palindrome (8978798).

The spelling of 1144387 in words is "one million, one hundred forty-four thousand, three hundred eighty-seven".