12471640 has 16 divisors (see below), whose sum is σ = 28061280. Its totient is φ = 4988640.

The previous prime is 12471631. The next prime is 12471643. The reversal of 12471640 is 4617421.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12471643) 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, 155856 + ... + 155935.

It is an arithmetic number, because the mean of its divisors is an integer number (1753830).

Almost surely, 2^12471640 is an apocalyptic number.

12471640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12471640 is an abundant number, since it is smaller than the sum of its proper divisors (15589640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12471640 is a wasteful number, since it uses less digits than its factorization.

12471640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311802 (or 311798 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 12471640 is about 3531.5209188110. The cubic root of 12471640 is about 231.9037948320.

The spelling of 12471640 in words is "twelve million, four hundred seventy-one thousand, six hundred forty".