1206221 has 4 divisors (see below), whose sum is σ = 1210944. Its totient is φ = 1201500.

The previous prime is 1206209. The next prime is 1206223. The reversal of 1206221 is 1226021.

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: 1226021 = 313 ⋅3917.

It is a cyclic number.

It is not a de Polignac number, because 1206221 - 2⁶ = 1206157 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1206196 and 1206205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206223) 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, 1955 + ... + 2496.

It is an arithmetic number, because the mean of its divisors is an integer number (302736).

2^1206221 is an apocalyptic number.

It is an amenable number.

1206221 is a deficient number, since it is larger than the sum of its proper divisors (4723).

1206221 is an equidigital number, since it uses as much as digits as its factorization.

1206221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1206221 is about 1098.2809294529. The cubic root of 1206221 is about 106.4491738049.

The spelling of 1206221 in words is "one million, two hundred six thousand, two hundred twenty-one".