12455520 has 192 divisors, whose sum is σ = 49061376. Its totient is φ = 2580480.

The previous prime is 12455503. The next prime is 12455533. The reversal of 12455520 is 2555421.

It is a happy number.

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

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 31 ways as a sum of consecutive naturals, for example, 36792 + ... + 37128.

It is an arithmetic number, because the mean of its divisors is an integer number (255528).

Almost surely, 2^12455520 is an apocalyptic number.

12455520 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 12455520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24530688).

12455520 is an abundant number, since it is smaller than the sum of its proper divisors (36605856).

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

12455520 is a wasteful number, since it uses less digits than its factorization.

12455520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 12455520 is about 3529.2378780694. The cubic root of 12455520 is about 231.8038373564.

Subtracting from 12455520 its reverse (2555421), we obtain a palindrome (9900099).

The spelling of 12455520 in words is "twelve million, four hundred fifty-five thousand, five hundred twenty".