12522240 has 108 divisors (see below), whose sum is σ = 43365504. Its totient is φ = 3336192.

The previous prime is 12522239. The next prime is 12522241. The reversal of 12522240 is 4222521.

It is an interprime number because it is at equal distance from previous prime (12522239) and next prime (12522241).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12522241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10977 + ... + 12063.

Almost surely, 2^12522240 is an apocalyptic number.

12522240 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 12522240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21682752).

12522240 is an abundant number, since it is smaller than the sum of its proper divisors (30843264).

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

12522240 is a wasteful number, since it uses less digits than its factorization.

12522240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12522240 is about 3538.6777191488. The cubic root of 12522240 is about 232.2169987133.

Adding to 12522240 its reverse (4222521), we get a palindrome (16744761).

The spelling of 12522240 in words is "twelve million, five hundred twenty-two thousand, two hundred forty".