12522840 has 128 divisors (see below), whose sum is σ = 41990400. Its totient is φ = 2961920.

The previous prime is 12522803. The next prime is 12522841. The reversal of 12522840 is 4822521.

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 12522840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522841) 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 31 ways as a sum of consecutive naturals, for example, 69871 + ... + 70049.

It is an arithmetic number, because the mean of its divisors is an integer number (328050).

Almost surely, 2^12522840 is an apocalyptic number.

12522840 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 12522840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20995200).

12522840 is an abundant number, since it is smaller than the sum of its proper divisors (29467560).

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

12522840 is a wasteful number, since it uses less digits than its factorization.

12522840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 12522840 is about 3538.7624955625. The cubic root of 12522840 is about 232.2207075272.

The spelling of 12522840 in words is "twelve million, five hundred twenty-two thousand, eight hundred forty".