12522780 has 72 divisors (see below), whose sum is σ = 39312000. Its totient is φ = 3222912.

The previous prime is 12522779. The next prime is 12522781. The reversal of 12522780 is 8722521.

It is an interprime number because it is at equal distance from previous prime (12522779) and next prime (12522781).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522781) 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 23 ways as a sum of consecutive naturals, for example, 4021 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (546000).

Almost surely, 2^12522780 is an apocalyptic number.

12522780 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 12522780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19656000).

12522780 is an abundant number, since it is smaller than the sum of its proper divisors (26789220).

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

12522780 is a wasteful number, since it uses less digits than its factorization.

12522780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 12522780 is about 3538.7540180126. The cubic root of 12522780 is about 232.2203366511.

The spelling of 12522780 in words is "twelve million, five hundred twenty-two thousand, seven hundred eighty".