11131545 has 16 divisors (see below), whose sum is σ = 18027072. Its totient is φ = 5864640.

The previous prime is 11131543. The next prime is 11131553. The reversal of 11131545 is 54513111.

It is a happy number.

It is not a de Polignac number, because 11131545 - 2¹ = 11131543 is a prime.

It is a super-2 number, since 2×11131545² = 247822588174050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11131543) 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 15 ways as a sum of consecutive naturals, for example, 3226 + ... + 5715.

It is an arithmetic number, because the mean of its divisors is an integer number (1126692).

Almost surely, 2^11131545 is an apocalyptic number.

11131545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11131545 is a deficient number, since it is larger than the sum of its proper divisors (6895527).

11131545 is an equidigital number, since it uses as much as digits as its factorization.

11131545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032.

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

The square root of 11131545 is about 3336.3970087506. The cubic root of 11131545 is about 223.2810241096.

Adding to 11131545 its reverse (54513111), we get a palindrome (65644656).

It can be divided in two parts, 1113 and 1545, that multiplied together give a triangular number (1719585 = T₁₈₅₄).

The spelling of 11131545 in words is "eleven million, one hundred thirty-one thousand, five hundred forty-five".