12521315 has 8 divisors (see below), whose sum is σ = 15679008. Its totient is φ = 9581440.

The previous prime is 12521309. The next prime is 12521329. The reversal of 12521315 is 51312521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12521315 - 2¹⁴ = 12504931 is a prime.

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, 54326 + ... + 54555.

It is an arithmetic number, because the mean of its divisors is an integer number (1959876).

Almost surely, 2^12521315 is an apocalyptic number.

12521315 is a deficient number, since it is larger than the sum of its proper divisors (3157693).

12521315 is a wasteful number, since it uses less digits than its factorization.

12521315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108909.

The product of its digits is 300, while the sum is 20.

The square root of 12521315 is about 3538.5470181983. The cubic root of 12521315 is about 232.2112807263.

Adding to 12521315 its reverse (51312521), we get a palindrome (63833836).

The spelling of 12521315 in words is "twelve million, five hundred twenty-one thousand, three hundred fifteen".