12011959 has 4 divisors (see below), whose sum is σ = 12085816. Its totient is φ = 11938104.

The previous prime is 12011953. The next prime is 12011969. The reversal of 12011959 is 95911021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95911021 = 1301 ⋅73721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011953) 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, 36684 + ... + 37009.

It is an arithmetic number, because the mean of its divisors is an integer number (3021454).

Almost surely, 2^12011959 is an apocalyptic number.

12011959 is a deficient number, since it is larger than the sum of its proper divisors (73857).

12011959 is an equidigital number, since it uses as much as digits as its factorization.

12011959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73856.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 12011959 is about 3465.8273182604. The cubic root of 12011959 is about 229.0188768025.

It can be divided in two parts, 1201 and 1959, that added together give a triangular number (3160 = T₇₉).

The spelling of 12011959 in words is "twelve million, eleven thousand, nine hundred fifty-nine".