1144781 has 6 divisors (see below), whose sum is σ = 1258446. Its totient is φ = 1040600.

The previous prime is 1144757. The next prime is 1144783. The reversal of 1144781 is 1874411.

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 75625 = 1034^2 + 275^2 .

It is not a de Polignac number, because 1144781 - 2¹⁴ = 1128397 is a prime.

It is a super-2 number, since 2×1144781² = 2621047075922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1144781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4610 + ... + 4851.

It is an arithmetic number, because the mean of its divisors is an integer number (209741).

2^1144781 is an apocalyptic number.

1144781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1144781 is a deficient number, since it is larger than the sum of its proper divisors (113665).

1144781 is an equidigital number, since it uses as much as digits as its factorization.

1144781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9483 (or 9472 counting only the distinct ones).

The product of its digits is 896, while the sum is 26.

The square root of 1144781 is about 1069.9443910783. The cubic root of 1144781 is about 104.6102253383.

The spelling of 1144781 in words is "one million, one hundred forty-four thousand, seven hundred eighty-one".