12530221 has 8 divisors (see below), whose sum is σ = 13824000. Its totient is φ = 11262240.

The previous prime is 12530213. The next prime is 12530251. The reversal of 12530221 is 12203521.

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

It is not a de Polignac number, because 12530221 - 2³ = 12530213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12530195 and 12530204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12530251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5421 + ... + 7378.

It is an arithmetic number, because the mean of its divisors is an integer number (1728000).

Almost surely, 2^12530221 is an apocalyptic number.

12530221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12530221 is a deficient number, since it is larger than the sum of its proper divisors (1293779).

12530221 is a wasteful number, since it uses less digits than its factorization.

12530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12899.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12530221 is about 3539.8052206301. The cubic root of 12530221 is about 232.2663224304.

Adding to 12530221 its reverse (12203521), we get a palindrome (24733742).

The spelling of 12530221 in words is "twelve million, five hundred thirty thousand, two hundred twenty-one".