11720645 has 16 divisors (see below), whose sum is σ = 14541120. Its totient is φ = 9064704.

The previous prime is 11720641. The next prime is 11720647. The reversal of 11720645 is 54602711.

11720645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11720645 - 2² = 11720641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19469 + ... + 20061.

It is an arithmetic number, because the mean of its divisors is an integer number (908820).

Almost surely, 2^11720645 is an apocalyptic number.

It is an amenable number.

11720645 is a deficient number, since it is larger than the sum of its proper divisors (2820475).

11720645 is an equidigital number, since it uses as much as digits as its factorization.

11720645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 11720645 is about 3423.5427556845. The cubic root of 11720645 is about 227.1523167989.

The spelling of 11720645 in words is "eleven million, seven hundred twenty thousand, six hundred forty-five".