1144505 has 4 divisors (see below), whose sum is σ = 1373412. Its totient is φ = 915600.

The previous prime is 1144499. The next prime is 1144511. The reversal of 1144505 is 5054411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5054411 = 23 ⋅219757.

It is an interprime number because it is at equal distance from previous prime (1144499) and next prime (1144511).

It can be written as a sum of positive squares in 2 ways, for example, as 779689 + 364816 = 883^2 + 604^2 .

It is not a de Polignac number, because 1144505 - 2⁶ = 1144441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114446 + ... + 114455.

It is an arithmetic number, because the mean of its divisors is an integer number (343353).

2^1144505 is an apocalyptic number.

It is an amenable number.

1144505 is a deficient number, since it is larger than the sum of its proper divisors (228907).

1144505 is an equidigital number, since it uses as much as digits as its factorization.

1144505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228906.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1144505 is about 1069.8154046376. The cubic root of 1144505 is about 104.6018176916.

Adding to 1144505 its reverse (5054411), we get a palindrome (6198916).

It can be divided in two parts, 11 and 44505, that multiplied together give a triangular number (489555 = T₉₈₉).

The spelling of 1144505 in words is "one million, one hundred forty-four thousand, five hundred five".