11156545 has 4 divisors (see below), whose sum is σ = 13387860. Its totient is φ = 8925232.

The previous prime is 11156527. The next prime is 11156549. The reversal of 11156545 is 54565111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54565111 = 3331 ⋅16381.

It can be written as a sum of positive squares in 2 ways, for example, as 4986289 + 6170256 = 2233^2 + 2484^2 .

It is a cyclic number.

It is not a de Polignac number, because 11156545 - 2¹¹ = 11154497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11156549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115650 + ... + 1115659.

It is an arithmetic number, because the mean of its divisors is an integer number (3346965).

Almost surely, 2^11156545 is an apocalyptic number.

It is an amenable number.

11156545 is a deficient number, since it is larger than the sum of its proper divisors (2231315).

11156545 is an equidigital number, since it uses as much as digits as its factorization.

11156545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231314.

The product of its digits is 3000, while the sum is 28.

The square root of 11156545 is about 3340.1414640700. The cubic root of 11156545 is about 223.4480524952.

The spelling of 11156545 in words is "eleven million, one hundred fifty-six thousand, five hundred forty-five".