11912171 has 2 divisors, whose sum is σ = 11912172. Its totient is φ = 11912170.

The previous prime is 11912129. The next prime is 11912177. The reversal of 11912171 is 17121911.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11912171 is a prime.

It is not a weakly prime, because it can be changed into another prime (11912177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5956085 + 5956086.

It is an arithmetic number, because the mean of its divisors is an integer number (5956086).

Almost surely, 2^11912171 is an apocalyptic number.

11912171 is a deficient number, since it is larger than the sum of its proper divisors (1).

11912171 is an equidigital number, since it uses as much as digits as its factorization.

11912171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126, while the sum is 23.

The square root of 11912171 is about 3451.4013096132. The cubic root of 11912171 is about 228.3829296542.

The spelling of 11912171 in words is "eleven million, nine hundred twelve thousand, one hundred seventy-one".