12501440 has 56 divisors (see below), whose sum is σ = 34027872. Its totient is φ = 4285440.

The previous prime is 12501427. The next prime is 12501473. The reversal of 12501440 is 4410521.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 5030.

Almost surely, 2^12501440 is an apocalyptic number.

12501440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12501440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17013936).

12501440 is an abundant number, since it is smaller than the sum of its proper divisors (21526432).

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

12501440 is an equidigital number, since it uses as much as digits as its factorization.

12501440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5605 (or 5595 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12501440 is about 3535.7375468210. The cubic root of 12501440 is about 232.0883531890.

Adding to 12501440 its reverse (4410521), we get a palindrome (16911961).

The spelling of 12501440 in words is "twelve million, five hundred one thousand, four hundred forty".