11630281 has 4 divisors (see below), whose sum is σ = 12524932. Its totient is φ = 10735632.

The previous prime is 11630273. The next prime is 11630303. The reversal of 11630281 is 18203611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4447881 + 7182400 = 2109^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 11630281 - 2³ = 11630273 is a prime.

It is a super-2 number, since 2×11630281² = 270526872277922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11610281) 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 3 ways as a sum of consecutive naturals, for example, 447306 + ... + 447331.

It is an arithmetic number, because the mean of its divisors is an integer number (3131233).

Almost surely, 2^11630281 is an apocalyptic number.

It is an amenable number.

11630281 is a deficient number, since it is larger than the sum of its proper divisors (894651).

11630281 is an equidigital number, since it uses as much as digits as its factorization.

11630281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894650.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 11630281 is about 3410.3197797274. The cubic root of 11630281 is about 226.5670426770.

Adding to 11630281 its reverse (18203611), we get a palindrome (29833892).

It can be divided in two parts, 11630 and 281, that added together give a palindrome (11911).

The spelling of 11630281 in words is "eleven million, six hundred thirty thousand, two hundred eighty-one".