12051287 has 4 divisors (see below), whose sum is σ = 12575280. Its totient is φ = 11527296.

The previous prime is 12051239. The next prime is 12051293. The reversal of 12051287 is 78215021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12051287 - 2⁸ = 12051031 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 (12051227) 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, 261962 + ... + 262007.

It is an arithmetic number, because the mean of its divisors is an integer number (3143820).

Almost surely, 2^12051287 is an apocalyptic number.

12051287 is a deficient number, since it is larger than the sum of its proper divisors (523993).

12051287 is an equidigital number, since it uses as much as digits as its factorization.

12051287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523992.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12051287 is about 3471.4963632416. The cubic root of 12051287 is about 229.2685458347.

The spelling of 12051287 in words is "twelve million, fifty-one thousand, two hundred eighty-seven".