12521360 has 40 divisors (see below), whose sum is σ = 29268216. Its totient is φ = 4981760.

The previous prime is 12521357. The next prime is 12521363. The reversal of 12521360 is 6312521.

It is an interprime number because it is at equal distance from previous prime (12521357) and next prime (12521363).

It can be written as a sum of positive squares in 4 ways, for example, as 355216 + 12166144 = 596^2 + 3488^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (12521363) 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 7 ways as a sum of consecutive naturals, for example, 22202 + ... + 22758.

Almost surely, 2^12521360 is an apocalyptic number.

12521360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12521360 is an abundant number, since it is smaller than the sum of its proper divisors (16746856).

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

12521360 is a wasteful number, since it uses less digits than its factorization.

12521360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12521360 is about 3538.5533767346. The cubic root of 12521360 is about 232.2115589052.

Adding to 12521360 its reverse (6312521), we get a palindrome (18833881).

The spelling of 12521360 in words is "twelve million, five hundred twenty-one thousand, three hundred sixty".