12602221 has 4 divisors (see below), whose sum is σ = 12623200. Its totient is φ = 12581244.

The previous prime is 12602207. The next prime is 12602267. The reversal of 12602221 is 12220621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12220621 = 7 ⋅1745803.

It is a cyclic number.

It is not a de Polignac number, because 12602221 - 2⁵ = 12602189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12602195 and 12602204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12602201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9561 + ... + 10798.

It is an arithmetic number, because the mean of its divisors is an integer number (3155800).

Almost surely, 2^12602221 is an apocalyptic number.

It is an amenable number.

12602221 is a deficient number, since it is larger than the sum of its proper divisors (20979).

12602221 is an equidigital number, since it uses as much as digits as its factorization.

12602221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20978.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 12602221 is about 3549.9607040079. The cubic root of 12602221 is about 232.7103488106.

Adding to 12602221 its reverse (12220621), we get a palindrome (24822842).

It can be divided in two parts, 126022 and 21, that multiplied together give a palindrome (2646462).

The spelling of 12602221 in words is "twelve million, six hundred two thousand, two hundred twenty-one".