12011956 has 12 divisors (see below), whose sum is σ = 22932000. Its totient is φ = 5459960.

The previous prime is 12011953. The next prime is 12011969. The reversal of 12011956 is 65911021.

It is a self number, because there is not a number n which added to its sum of digits gives 12011956.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136456 + ... + 136543.

It is an arithmetic number, because the mean of its divisors is an integer number (1911000).

Almost surely, 2^12011956 is an apocalyptic number.

It is an amenable number.

12011956 is a deficient number, since it is larger than the sum of its proper divisors (10920044).

12011956 is a wasteful number, since it uses less digits than its factorization.

12011956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273014 (or 273012 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 12011956 is about 3465.8268854633. The cubic root of 12011956 is about 229.0188577365.

Adding to 12011956 its reverse (65911021), we get a palindrome (77922977).

The spelling of 12011956 in words is "twelve million, eleven thousand, nine hundred fifty-six".