11971136 has 14 divisors (see below), whose sum is σ = 23755350. Its totient is φ = 5985536.

The previous prime is 11971117. The next prime is 11971199. The reversal of 11971136 is 63117911.

It can be written as a sum of positive squares in only one way, i.e., 8526400 + 3444736 = 2920^2 + 1856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11971099 and 11971108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93461 + ... + 93588.

Almost surely, 2^11971136 is an apocalyptic number.

11971136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11971136 is a deficient number, since it is larger than the sum of its proper divisors (11784214).

11971136 is an equidigital number, since it uses as much as digits as its factorization.

11971136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187061 (or 187051 counting only the distinct ones).

The product of its digits is 1134, while the sum is 29.

The square root of 11971136 is about 3459.9329473272. The cubic root of 11971136 is about 228.7591398500.

The spelling of 11971136 in words is "eleven million, nine hundred seventy-one thousand, one hundred thirty-six".