12521316 has 24 divisors (see below), whose sum is σ = 30935520. Its totient is φ = 3928192.

The previous prime is 12521309. The next prime is 12521329. The reversal of 12521316 is 61312521.

It is a junction number, because it is equal to n+sod(n) for n = 12521292 and 12521301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30486 + ... + 30893.

It is an arithmetic number, because the mean of its divisors is an integer number (1288980).

Almost surely, 2^12521316 is an apocalyptic number.

It is an amenable number.

12521316 is an abundant number, since it is smaller than the sum of its proper divisors (18414204).

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

12521316 is a wasteful number, since it uses less digits than its factorization.

12521316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61403 (or 61401 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 12521316 is about 3538.5471594992. The cubic root of 12521316 is about 232.2112869081.

Adding to 12521316 its reverse (61312521), we get a palindrome (73833837).

The spelling of 12521316 in words is "twelve million, five hundred twenty-one thousand, three hundred sixteen".