11803971 has 16 divisors (see below), whose sum is σ = 16058880. Its totient is φ = 7711200.

The previous prime is 11803969. The next prime is 11804021. The reversal of 11803971 is 17930811.

It is not a de Polignac number, because 11803971 - 2¹ = 11803969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11803931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49270 + ... + 49508.

It is an arithmetic number, because the mean of its divisors is an integer number (1003680).

Almost surely, 2^11803971 is an apocalyptic number.

11803971 is a deficient number, since it is larger than the sum of its proper divisors (4254909).

11803971 is a wasteful number, since it uses less digits than its factorization.

11803971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 11803971 is about 3435.6907602402. The cubic root of 11803971 is about 227.6893468522.

It can be divided in two parts, 1180 and 3971, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 11803971 in words is "eleven million, eight hundred three thousand, nine hundred seventy-one".