13811145 has 8 divisors (see below), whose sum is σ = 22097856. Its totient is φ = 7365936.

The previous prime is 13811131. The next prime is 13811159. The reversal of 13811145 is 54111831.

It is an interprime number because it is at equal distance from previous prime (13811131) and next prime (13811159).

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

It is not a de Polignac number, because 13811145 - 2⁵ = 13811113 is a prime.

It is a super-3 number, since 3×13811145³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460357 + ... + 460386.

It is an arithmetic number, because the mean of its divisors is an integer number (2762232).

Almost surely, 2^13811145 is an apocalyptic number.

13811145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13811145 is a deficient number, since it is larger than the sum of its proper divisors (8286711).

13811145 is an equidigital number, since it uses as much as digits as its factorization.

13811145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920751.

The product of its digits is 480, while the sum is 24.

The square root of 13811145 is about 3716.3348880315. The cubic root of 13811145 is about 239.9255845677.

Adding to 13811145 its reverse (54111831), we get a palindrome (67922976).

The spelling of 13811145 in words is "thirteen million, eight hundred eleven thousand, one hundred forty-five".