11985151 has 4 divisors (see below), whose sum is σ = 12309112. Its totient is φ = 11661192.

The previous prime is 11985137. The next prime is 11985163. The reversal of 11985151 is 15158911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15158911 = 503 ⋅30137.

It is a cyclic number.

It is not a de Polignac number, because 11985151 - 2⁹ = 11984639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11985101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161925 + ... + 161998.

It is an arithmetic number, because the mean of its divisors is an integer number (3077278).

Almost surely, 2^11985151 is an apocalyptic number.

11985151 is a deficient number, since it is larger than the sum of its proper divisors (323961).

11985151 is an equidigital number, since it uses as much as digits as its factorization.

11985151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323960.

The product of its digits is 1800, while the sum is 31.

The square root of 11985151 is about 3461.9576831614. The cubic root of 11985151 is about 228.8483769676.

The spelling of 11985151 in words is "eleven million, nine hundred eighty-five thousand, one hundred fifty-one".