12470521 has 4 divisors (see below), whose sum is σ = 14252032. Its totient is φ = 10689012.

The previous prime is 12470467. The next prime is 12470527. The reversal of 12470521 is 12507421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12470521 - 2⁹ = 12470009 is a prime.

It is a super-2 number, since 2×12470521² = 311027788022882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12470492 and 12470501.

It is not an unprimeable number, because it can be changed into a prime (12470527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890745 + ... + 890758.

It is an arithmetic number, because the mean of its divisors is an integer number (3563008).

Almost surely, 2^12470521 is an apocalyptic number.

It is an amenable number.

12470521 is a deficient number, since it is larger than the sum of its proper divisors (1781511).

12470521 is an equidigital number, since it uses as much as digits as its factorization.

12470521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781510.

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

The square root of 12470521 is about 3531.3624849341. The cubic root of 12470521 is about 231.8968588795.

Adding to 12470521 its reverse (12507421), we get a palindrome (24977942).

The spelling of 12470521 in words is "twelve million, four hundred seventy thousand, five hundred twenty-one".