11656123 has 4 divisors (see below), whose sum is σ = 11740120. Its totient is φ = 11572128.

The previous prime is 11656111. The next prime is 11656159. The reversal of 11656123 is 32165611.

11656123 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32165611 = 29 ⋅1109159.

It is a cyclic number.

It is not a de Polignac number, because 11656123 - 2¹⁷ = 11525051 is a prime.

It is a super-2 number, since 2×11656123² = 271730406782258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11656103) 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, 41790 + ... + 42067.

It is an arithmetic number, because the mean of its divisors is an integer number (2935030).

Almost surely, 2^11656123 is an apocalyptic number.

11656123 is a deficient number, since it is larger than the sum of its proper divisors (83997).

11656123 is an equidigital number, since it uses as much as digits as its factorization.

11656123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83996.

The product of its digits is 1080, while the sum is 25.

The square root of 11656123 is about 3414.1064716848. The cubic root of 11656123 is about 226.7347260540.

The spelling of 11656123 in words is "eleven million, six hundred fifty-six thousand, one hundred twenty-three".