11145481 has 4 divisors (see below), whose sum is σ = 11417364. Its totient is φ = 10873600.

The previous prime is 11145469. The next prime is 11145487. The reversal of 11145481 is 18454111.

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 6375625 + 4769856 = 2525^2 + 2184^2 .

It is a cyclic number.

It is not a de Polignac number, because 11145481 - 2²¹ = 9048329 is a prime.

It is a super-3 number, since 3×11145481³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11145487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135880 + ... + 135961.

It is an arithmetic number, because the mean of its divisors is an integer number (2854341).

Almost surely, 2^11145481 is an apocalyptic number.

It is an amenable number.

11145481 is a deficient number, since it is larger than the sum of its proper divisors (271883).

11145481 is an equidigital number, since it uses as much as digits as its factorization.

11145481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271882.

The product of its digits is 640, while the sum is 25.

The square root of 11145481 is about 3338.4848359698. The cubic root of 11145481 is about 223.3741632239.

Adding to 11145481 its reverse (18454111), we get a palindrome (29599592).

The spelling of 11145481 in words is "eleven million, one hundred forty-five thousand, four hundred eighty-one".