12887471 has 4 divisors (see below), whose sum is σ = 12944472. Its totient is φ = 12830472.

The previous prime is 12887461. The next prime is 12887473. The reversal of 12887471 is 17478821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17478821 = 2027 ⋅8623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12887471 is a prime.

It is a super-3 number, since 3×12887471³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887473) 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, 28160 + ... + 28613.

It is an arithmetic number, because the mean of its divisors is an integer number (3236118).

Almost surely, 2^12887471 is an apocalyptic number.

12887471 is a deficient number, since it is larger than the sum of its proper divisors (57001).

12887471 is an equidigital number, since it uses as much as digits as its factorization.

12887471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57000.

The product of its digits is 25088, while the sum is 38.

The square root of 12887471 is about 3589.9123944743. The cubic root of 12887471 is about 234.4530572835.

The spelling of 12887471 in words is "twelve million, eight hundred eighty-seven thousand, four hundred seventy-one".