12220415 has 4 divisors (see below), whose sum is σ = 14664504. Its totient is φ = 9776328.

The previous prime is 12220393. The next prime is 12220421. The reversal of 12220415 is 51402221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51402221 = 13 ⋅3954017.

It is a cyclic number.

It is not a de Polignac number, because 12220415 - 2¹⁰ = 12219391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220393 and 12220402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222037 + ... + 1222046.

It is an arithmetic number, because the mean of its divisors is an integer number (3666126).

Almost surely, 2^12220415 is an apocalyptic number.

12220415 is a deficient number, since it is larger than the sum of its proper divisors (2444089).

12220415 is an equidigital number, since it uses as much as digits as its factorization.

12220415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444088.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12220415 is about 3495.7710165284. The cubic root of 12220415 is about 230.3360871040.

Adding to 12220415 its reverse (51402221), we get a palindrome (63622636).

The spelling of 12220415 in words is "twelve million, two hundred twenty thousand, four hundred fifteen".