12071487 has 4 divisors (see below), whose sum is σ = 16095320. Its totient is φ = 8047656.

The previous prime is 12071467. The next prime is 12071489. The reversal of 12071487 is 78417021.

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

It is not a de Polignac number, because 12071487 - 2¹⁰ = 12070463 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 (12071489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011912 + ... + 2011917.

It is an arithmetic number, because the mean of its divisors is an integer number (4023830).

Almost surely, 2^12071487 is an apocalyptic number.

12071487 is a deficient number, since it is larger than the sum of its proper divisors (4023833).

12071487 is an equidigital number, since it uses as much as digits as its factorization.

12071487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023832.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 12071487 is about 3474.4045533012. The cubic root of 12071487 is about 229.3965719799.

The spelling of 12071487 in words is "twelve million, seventy-one thousand, four hundred eighty-seven".