1144989 has 8 divisors (see below), whose sum is σ = 1696320. Its totient is φ = 763308.

The previous prime is 1144981. The next prime is 1144993. The reversal of 1144989 is 9894411.

It is not a de Polignac number, because 1144989 - 2³ = 1144981 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21177 + ... + 21230.

It is an arithmetic number, because the mean of its divisors is an integer number (212040).

2^1144989 is an apocalyptic number.

It is an amenable number.

1144989 is a deficient number, since it is larger than the sum of its proper divisors (551331).

1144989 is an equidigital number, since it uses as much as digits as its factorization.

1144989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42416 (or 42410 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1144989 is about 1070.0415879768. The cubic root of 1144989 is about 104.6165606430.

The spelling of 1144989 in words is "one million, one hundred forty-four thousand, nine hundred eighty-nine".