1144865 has 8 divisors (see below), whose sum is σ = 1454760. Its totient is φ = 861952.

The previous prime is 1144837. The next prime is 1144867. The reversal of 1144865 is 5684411.

It can be written as a sum of positive squares in 4 ways, for example, as 300304 + 844561 = 548^2 + 919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1144865 - 2¹⁶ = 1079329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6650 + ... + 6819.

It is an arithmetic number, because the mean of its divisors is an integer number (181845).

2^1144865 is an apocalyptic number.

It is an amenable number.

1144865 is a deficient number, since it is larger than the sum of its proper divisors (309895).

1144865 is a wasteful number, since it uses less digits than its factorization.

1144865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13491.

The product of its digits is 3840, while the sum is 29.

The square root of 1144865 is about 1069.9836447348. The cubic root of 1144865 is about 104.6127839191.

The spelling of 1144865 in words is "one million, one hundred forty-four thousand, eight hundred sixty-five".