11531145 has 16 divisors (see below), whose sum is σ = 18493632. Its totient is φ = 6135360.

The previous prime is 11531141. The next prime is 11531147. The reversal of 11531145 is 54113511.

It is a happy number.

11531145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11531145 - 2² = 11531141 is a prime.

It is a super-2 number, since 2×11531145² = 265934610022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11531141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9334 + ... + 10496.

It is an arithmetic number, because the mean of its divisors is an integer number (1155852).

Almost surely, 2^11531145 is an apocalyptic number.

11531145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11531145 is a deficient number, since it is larger than the sum of its proper divisors (6962487).

11531145 is a wasteful number, since it uses less digits than its factorization.

11531145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832.

The product of its digits is 300, while the sum is 21.

The square root of 11531145 is about 3395.7539663527. The cubic root of 11531145 is about 225.9214557246.

Adding to 11531145 its reverse (54113511), we get a palindrome (65644656).

The spelling of 11531145 in words is "eleven million, five hundred thirty-one thousand, one hundred forty-five".