11955851 has 2 divisors, whose sum is σ = 11955852. Its totient is φ = 11955850.

The previous prime is 11955841. The next prime is 11955869. The reversal of 11955851 is 15855911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11955851 - 2¹⁰ = 11954827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11955821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5977925 + 5977926.

It is an arithmetic number, because the mean of its divisors is an integer number (5977926).

Almost surely, 2^11955851 is an apocalyptic number.

11955851 is a deficient number, since it is larger than the sum of its proper divisors (1).

11955851 is an equidigital number, since it uses as much as digits as its factorization.

11955851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 35.

The square root of 11955851 is about 3457.7233839623. The cubic root of 11955851 is about 228.6617368778.

The spelling of 11955851 in words is "eleven million, nine hundred fifty-five thousand, eight hundred fifty-one".