12562440 has 128 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 2937600.

The previous prime is 12562427. The next prime is 12562447. The reversal of 12562440 is 4426521.

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 12562440.

It is not an unprimeable number, because it can be changed into a prime (12562447) by changing a digit.

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, 40767 + ... + 41073.

It is an arithmetic number, because the mean of its divisors is an integer number (332640).

Almost surely, 2^12562440 is an apocalyptic number.

12562440 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 12562440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21288960).

12562440 is an abundant number, since it is smaller than the sum of its proper divisors (30015480).

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

12562440 is a wasteful number, since it uses less digits than its factorization.

12562440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 12562440 is about 3544.3532555320. The cubic root of 12562440 is about 232.4652277747.

Adding to 12562440 its reverse (4426521), we get a palindrome (16988961).

The spelling of 12562440 in words is "twelve million, five hundred sixty-two thousand, four hundred forty".