11656043 has 4 divisors (see below), whose sum is σ = 13321200. Its totient is φ = 9990888.

The previous prime is 11656037. The next prime is 11656049. The reversal of 11656043 is 34065611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34065611 = 2963 ⋅11497.

It is an interprime number because it is at equal distance from previous prime (11656037) and next prime (11656049).

It is a cyclic number.

It is not a de Polignac number, because 11656043 - 2⁶ = 11655979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11656049) 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, 832568 + ... + 832581.

It is an arithmetic number, because the mean of its divisors is an integer number (3330300).

Almost surely, 2^11656043 is an apocalyptic number.

11656043 is a deficient number, since it is larger than the sum of its proper divisors (1665157).

11656043 is an equidigital number, since it uses as much as digits as its factorization.

11656043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665156.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 11656043 is about 3414.0947555685. The cubic root of 11656043 is about 226.7342073333.

The spelling of 11656043 in words is "eleven million, six hundred fifty-six thousand, forty-three".