12520471 has 8 divisors (see below), whose sum is σ = 12847104. Its totient is φ = 12196440.

The previous prime is 12520463. The next prime is 12520477. The reversal of 12520471 is 17402521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12520471 - 2³ = 12520463 is a prime.

It is a super-3 number, since 3×12520471³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520477) 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, 12246 + ... + 13228.

It is an arithmetic number, because the mean of its divisors is an integer number (1605888).

Almost surely, 2^12520471 is an apocalyptic number.

12520471 is a deficient number, since it is larger than the sum of its proper divisors (326633).

12520471 is an equidigital number, since it uses as much as digits as its factorization.

12520471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 12520471 is about 3538.4277582000. The cubic root of 12520471 is about 232.2060632039.

Adding to 12520471 its reverse (17402521), we get a palindrome (29922992).

The spelling of 12520471 in words is "twelve million, five hundred twenty thousand, four hundred seventy-one".