11078561 has 4 divisors (see below), whose sum is σ = 11930772. Its totient is φ = 10226352.

The previous prime is 11078531. The next prime is 11078579. The reversal of 11078561 is 16587011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 555025 + 10523536 = 745^2 + 3244^2 .

It is a cyclic number.

It is not a de Polignac number, because 11078561 - 2⁶ = 11078497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11078521) 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, 426086 + ... + 426111.

It is an arithmetic number, because the mean of its divisors is an integer number (2982693).

Almost surely, 2^11078561 is an apocalyptic number.

It is an amenable number.

11078561 is a deficient number, since it is larger than the sum of its proper divisors (852211).

11078561 is an equidigital number, since it uses as much as digits as its factorization.

11078561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852210.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 11078561 is about 3328.4472355740. The cubic root of 11078561 is about 222.9262023968.

The spelling of 11078561 in words is "eleven million, seventy-eight thousand, five hundred sixty-one".