12471987 has 16 divisors (see below), whose sum is σ = 18202752. Its totient is φ = 7533120.

The previous prime is 12471973. The next prime is 12472039. The reversal of 12471987 is 78917421.

It is not a de Polignac number, because 12471987 - 2⁴ = 12471971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12471917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14668 + ... + 15494.

It is an arithmetic number, because the mean of its divisors is an integer number (1137672).

Almost surely, 2^12471987 is an apocalyptic number.

12471987 is a deficient number, since it is larger than the sum of its proper divisors (5730765).

12471987 is a wasteful number, since it uses less digits than its factorization.

12471987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298.

The product of its digits is 28224, while the sum is 39.

The square root of 12471987 is about 3531.5700474435. The cubic root of 12471987 is about 231.9059455748.

The spelling of 12471987 in words is "twelve million, four hundred seventy-one thousand, nine hundred eighty-seven".