11573545 has 4 divisors (see below), whose sum is σ = 13888260. Its totient is φ = 9258832.

The previous prime is 11573539. The next prime is 11573567. The reversal of 11573545 is 54537511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54537511 = 7 ⋅7791073.

It can be written as a sum of positive squares in 2 ways, for example, as 5875776 + 5697769 = 2424^2 + 2387^2 .

It is a cyclic number.

It is not a de Polignac number, because 11573545 - 2¹⁵ = 11540777 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157350 + ... + 1157359.

It is an arithmetic number, because the mean of its divisors is an integer number (3472065).

Almost surely, 2^11573545 is an apocalyptic number.

It is an amenable number.

11573545 is a deficient number, since it is larger than the sum of its proper divisors (2314715).

11573545 is an equidigital number, since it uses as much as digits as its factorization.

11573545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314714.

The product of its digits is 10500, while the sum is 31.

The square root of 11573545 is about 3401.9913286192. The cubic root of 11573545 is about 226.1980212899.

The spelling of 11573545 in words is "eleven million, five hundred seventy-three thousand, five hundred forty-five".