11145131 has 4 divisors (see below), whose sum is σ = 11154264. Its totient is φ = 11136000.

The previous prime is 11145109. The next prime is 11145137. The reversal of 11145131 is 13154111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13154111 = 89 ⋅147799.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11145131 is a prime.

It is a super-2 number, since 2×11145131² = 248427890014322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11145137) 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, 2390 + ... + 5291.

It is an arithmetic number, because the mean of its divisors is an integer number (2788566).

Almost surely, 2^11145131 is an apocalyptic number.

11145131 is a deficient number, since it is larger than the sum of its proper divisors (9133).

11145131 is an equidigital number, since it uses as much as digits as its factorization.

11145131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132.

The product of its digits is 60, while the sum is 17.

The square root of 11145131 is about 3338.4324165692. The cubic root of 11145131 is about 223.3718250034.

Adding to 11145131 its reverse (13154111), we get a palindrome (24299242).

The spelling of 11145131 in words is "eleven million, one hundred forty-five thousand, one hundred thirty-one".