11921956 has 6 divisors (see below), whose sum is σ = 20863430. Its totient is φ = 5960976.

The previous prime is 11921933. The next prime is 11921957. The reversal of 11921956 is 65912911.

It is a happy number.

11921956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11792356 + 129600 = 3434^2 + 360^2 .

It is not an unprimeable number, because it can be changed into a prime (11921957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1490241 + ... + 1490248.

Almost surely, 2^11921956 is an apocalyptic number.

It is an amenable number.

11921956 is a deficient number, since it is larger than the sum of its proper divisors (8941474).

11921956 is a wasteful number, since it uses less digits than its factorization.

11921956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980493 (or 2980491 counting only the distinct ones).

The product of its digits is 4860, while the sum is 34.

The square root of 11921956 is about 3452.8185588009. The cubic root of 11921956 is about 228.4454459762.

The spelling of 11921956 in words is "eleven million, nine hundred twenty-one thousand, nine hundred fifty-six".