12352521 has 16 divisors (see below), whose sum is σ = 17458560. Its totient is φ = 7754880.

The previous prime is 12352511. The next prime is 12352531. The reversal of 12352521 is 12525321.

12352521 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12352511) and next prime (12352531).

It is not a de Polignac number, because 12352521 - 2⁹ = 12352009 is a prime.

It is a super-3 number, since 3×12352521³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12352511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1836 + ... + 5298.

It is an arithmetic number, because the mean of its divisors is an integer number (1091160).

Almost surely, 2^12352521 is an apocalyptic number.

It is an amenable number.

12352521 is a deficient number, since it is larger than the sum of its proper divisors (5106039).

12352521 is a wasteful number, since it uses less digits than its factorization.

12352521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536.

The product of its digits is 600, while the sum is 21.

The square root of 12352521 is about 3514.6153416839. The cubic root of 12352521 is about 231.1631126221.

Adding to 12352521 its reverse (12525321), we get a palindrome (24877842).

The spelling of 12352521 in words is "twelve million, three hundred fifty-two thousand, five hundred twenty-one".