12001287 has 8 divisors (see below), whose sum is σ = 16042480. Its totient is φ = 7980480.

The previous prime is 12001279. The next prime is 12001289. The reversal of 12001287 is 78210021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12001287 - 2³ = 12001279 is a prime.

It is a Duffinian number.

12001287 is a modest number, since divided by 1287 gives 12 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3664 + ... + 6117.

It is an arithmetic number, because the mean of its divisors is an integer number (2005310).

Almost surely, 2^12001287 is an apocalyptic number.

12001287 is a deficient number, since it is larger than the sum of its proper divisors (4041193).

12001287 is an equidigital number, since it uses as much as digits as its factorization.

12001287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10193.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 12001287 is about 3464.2873726064. The cubic root of 12001287 is about 228.9510329249.

The spelling of 12001287 in words is "twelve million, one thousand, two hundred eighty-seven".