12481440 has 48 divisors (see below), whose sum is σ = 39318048. Its totient is φ = 3328256.

The previous prime is 12481439. The next prime is 12481463. The reversal of 12481440 is 4418421.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×12481440³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12481440.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12522 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (819126).

Almost surely, 2^12481440 is an apocalyptic number.

12481440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12481440 is an abundant number, since it is smaller than the sum of its proper divisors (26836608).

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

12481440 is a wasteful number, since it uses less digits than its factorization.

12481440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26021 (or 26013 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 12481440 is about 3532.9081505185. The cubic root of 12481440 is about 231.9645209321.

Adding to 12481440 its reverse (4418421), we get a palindrome (16899861).

It can be divided in two parts, 12481 and 440, that added together give a palindrome (12921).

The spelling of 12481440 in words is "twelve million, four hundred eighty-one thousand, four hundred forty".