11556545 has 32 divisors (see below), whose sum is σ = 18627840. Its totient is φ = 6647040.

The previous prime is 11556539. The next prime is 11556553. The reversal of 11556545 is 54565511.

11556545 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 11556545 - 2¹² = 11552449 is a prime.

It is a super-5 number, since 5×11556545⁵ (a number of 37 digits) contains 55555 as substring.

It is a Smith number, since the sum of its digits (32) 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 31 ways as a sum of consecutive naturals, for example, 3851 + ... + 6159.

It is an arithmetic number, because the mean of its divisors is an integer number (582120).

Almost surely, 2^11556545 is an apocalyptic number.

It is an amenable number.

11556545 is a deficient number, since it is larger than the sum of its proper divisors (7071295).

11556545 is a wasteful number, since it uses less digits than its factorization.

11556545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345.

The product of its digits is 15000, while the sum is 32.

The square root of 11556545 is about 3399.4918737953. The cubic root of 11556545 is about 226.0872154052.

The spelling of 11556545 in words is "eleven million, five hundred fifty-six thousand, five hundred forty-five".