11658641 has 4 divisors (see below), whose sum is σ = 11668800. Its totient is φ = 11648484.

The previous prime is 11658629. The next prime is 11658671. The reversal of 11658641 is 14685611.

11658641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14685611 = 53 ⋅277087.

It is a cyclic number.

It is not a de Polignac number, because 11658641 - 2¹⁰ = 11657617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11658598 and 11658607.

It is not an unprimeable number, because it can be changed into a prime (11658601) 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, 3101 + ... + 5738.

It is an arithmetic number, because the mean of its divisors is an integer number (2917200).

Almost surely, 2^11658641 is an apocalyptic number.

It is an amenable number.

11658641 is a deficient number, since it is larger than the sum of its proper divisors (10159).

11658641 is an equidigital number, since it uses as much as digits as its factorization.

11658641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10158.

The product of its digits is 5760, while the sum is 32.

The square root of 11658641 is about 3414.4752159007. The cubic root of 11658641 is about 226.7510515777.

The spelling of 11658641 in words is "eleven million, six hundred fifty-eight thousand, six hundred forty-one".