12471999 has 32 divisors (see below), whose sum is σ = 18927360. Its totient is φ = 7257600.

The previous prime is 12471973. The next prime is 12472039. The reversal of 12471999 is 99917421.

12471999 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 12471999 - 2⁷ = 12471871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12471999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12471919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59004 + ... + 59214.

It is an arithmetic number, because the mean of its divisors is an integer number (591480).

Almost surely, 2^12471999 is an apocalyptic number.

12471999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12471999 is a deficient number, since it is larger than the sum of its proper divisors (6455361).

12471999 is a wasteful number, since it uses less digits than its factorization.

12471999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its digits is 40824, while the sum is 42.

The square root of 12471999 is about 3531.5717464041. The cubic root of 12471999 is about 231.9060199513.

The spelling of 12471999 in words is "twelve million, four hundred seventy-one thousand, nine hundred ninety-nine".